---
product_id: 3726473
title: "Authentic (M21-187-C-342) PermaSleeve Heat Shrink Tubing for Control and Electrical Panels, Wire Harness, Black on White-For M210, M210-LAB, M211, BMP21-PLUS and BMP21-LAB Printers, .335\" W 7' L"
brand: "brady"
price: "$186"
currency: NZD
in_stock: true
reviews_count: 8
url: https://www.desertcart.nz/products/3726473-authentic-m21-187-c-342-permasleeve-heat-shrink-tubing-control
store_origin: NZ
region: New Zealand
---

# 3:1 heat shrink ratio for snug fit Compatible with BMP21-PLUS printers Chemical & abrasion resistant Authentic (M21-187-C-342) PermaSleeve Heat Shrink Tubing for Control and Electrical Panels, Wire Harness, Black on White-For M210, M210-LAB, M211, BMP21-PLUS and BMP21-LAB Printers, .335" W 7' L

**Brand:** brady
**Price:** $186
**Availability:** ✅ In Stock

## Summary

> ⚡ Label Like a Pro, Shrink Like a Boss!

## Quick Answers

- **What is this?** Authentic (M21-187-C-342) PermaSleeve Heat Shrink Tubing for Control and Electrical Panels, Wire Harness, Black on White-For M210, M210-LAB, M211, BMP21-PLUS and BMP21-LAB Printers, .335" W 7' L by brady
- **How much does it cost?** $186 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/3726473-authentic-m21-187-c-342-permasleeve-heat-shrink-tubing-control)

## Best For

- brady enthusiasts

## Why This Product

- Trusted brady brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Shrink-to-Fit Precision:** 3:1 heat shrink ratio ensures a tight, permanent fit around wires and cables, eliminating slippage and enhancing durability.
- • **UL & RoHS Certified Quality:** Meets UL224 and RoHS standards, ensuring safety, compliance, and peace of mind for your critical electrical projects.
- • **Crystal Clear Identification:** Black-on-white smudge-proof printing delivers high-contrast, legible labels that stand out for quick wire identification.
- • **Seamless Printer Compatibility:** Optimized for Brady BMP21-PLUS, M210, and LAB series printers, making labeling fast, professional, and hassle-free.
- • **Built to Brave Harsh Environments:** Resistant to chemicals, grease, oil, and cleaning agents—ideal for industrial and electrical panel applications where reliability matters.

## Overview

Brady Authentic PermaSleeve Heat Shrink Tubing offers a professional-grade, 3:1 shrink ratio polyolefin sleeve designed for permanent wire and cable identification. Compatible with Brady BMP21-PLUS and related printers, it withstands harsh industrial environments with chemical and abrasion resistance, while providing smudge-proof, high-contrast black-on-white printing. UL and RoHS certified, this 7-foot tubing is the go-to solution for electrical contractors and maintenance pros seeking durable, compliant wire marking.

## Description

Brady B-342 Thermal Transfer / Dot Matrix Printable Nylon Cloth Label Brady’s non-adhesive, printable heat shrink wire marking sleeves fit around wires or cables for maximum insulation protection and permanent identification. Brady’s heat shrink sleeving is a full-circle design that provides fast and permanent wire marking. Clear, legible text can be printed on the wire and cable sleeving with a Brady printer for reliable wire identification. Brady heat shrink sleeving materials excel in extreme environments, including temperature fluctuations and environments that require abrasion and chemical resistance. Brady offers a variety of materials available to print using thermal transfer and dot matrix printers. B-342 3:1 heat shinkable sleeves for wire identification and insulation purposes are fade resistant and fire retardant. B-342 is available in white, yellow, black, red, orange, green, blue, violet, pink, gray, and brown. Material Description Print Technology: Thermal transfer and dot matrix Material Type: Irradiated polyolefin heat shrink tubing (3:1 shrink ratio) Temperature Range: -55°C (-67°F) to +135°C (+275°F) Shrink Method: Any industrial grade heat gun may be used to shrink B-342 Markers. Recommended Thermal Transfer RibbonsThermal transfer ribbons are only needed for labels that do not have self-contained print ribbons. Brady R6600 Series for thermal transfer printing - best smear and chemical resistance Brady R4300 Series for thermal transfer printing - general purpose ribbon Brady R4502S for thermal transfer printing silver on dark colored markers Brady R6000 Series Halogen Free (previously known as R6000HF) Brady R6700 for thermal transfer printing white on dark colored markers Brady R5000 Series for dot matrix printing Regulatory Agency Approvals UL: B-342 is a UL Recognized Component to UL224 Extruded Insulated Tubing. See UL file E333786 for specific details. UL information can be accessed on line at UL.com. Search in Certifications area. RoHS 2005/618/EC: As of January 2009, Brady began the transition to full RoHS compliant B-342 to 2005/618/EC MCV amendment to RoHS Directive 2002/95/EC. To determine if you have RoHS compliant product please contact customer service. SAE: B-342 PermaSleeve Markers meet the material and physical property requirements of SAE AMS-DTL-23053/5C (Class 1) for Insulation Sleeving and SAE AS-81531 for Marking of Electrical Insulating Materials when printed with R6600, R4300, R4502S, R6700 Series thermal transfer ribbons and R5000 Series dot matrix. About Brady Brady manufactures signs, labels, lockout tagout solutions, safety devices, industrial label printers, software, and spill control used to comply with regulatory standards in electronics, telecommunications, manufacturing, electrical, construction, education, and medical industries. The company, founded in 1914, is headquartered in Milwaukee, WI. Visit the Brady Label Finder Store to find labels for your printer. Sizing Chart Sleeve Size Range of Diameter (in) Range of Diameter (mm) Approximate Gauge 3/32" (0.094) 0.023 - 0.080 0.58 - 2.03 28 to 20 1/8" (0.125) 0.046 - 0.110 1.17 - 2.79 22 to 16 3/16" (0.188) 0.062 - 0.150 1.57 - 3.81 20 to 10 1/4" (0.250) 0.094 - 0.215 2.39 - 5.46 16 to 8 3/8" (0.375) 0.125 - 0.320 3.18 - 8.13 12 to 4 1/2" (0.500) 0.187 - 0.450 4.75 - 11.43 8 to 1 3/4" (0.750) 0.250 - 0.700 6.35 - 17.78 6 to 4/0 1" (1.000) 0.375 - 0.950 9.53 - 24.13 2 to 0.950 1 1/2" (1.500) 0.500 - 1.450 12.7 - 36.83 NA . Wire Gauge Range :20 AWG to 10 AWG

Review: PermaSleeve Label - I received my Brady label as of October 7, 2025, it has a yellow color, fits perfectly for my Brady M210 labeller, I hope this will fit to any sleeve, I recommend buying this from Brady its quite pricy for a label but its genuine, you get what you paid for!
Review: Awesome product - Great for numbering or lettering cables!

## Features

- Made from Brady's B-342 Polyolefin PermaSleeve Marker material, a non-adhesive, heat-shrinking sleeve that fits around wires or cables for insulation and easy permanent identification
- 3:1 heat-shrinking wire marking sleeve is ideal for labeling in harsh environments and is resistant to exposure to chemicals, grease, oil, and cleaning agents
- Polyolefin wire marking sleeves print in black text on a white background with a smudge-proof finish
- Permasleeve labels provide a wire marking solution that combines speed, ease of use, and permanence to create long-lasting, high quality identification
- Compatible with the BMP21-PLUS or ID PAL label printers, permasleeve wire labels are an indispensable asset for electrical contractors, maintenance crews, construction teams, and industrial professionals.Always use official Brady labels designed for use with BMP21-PLUS, BMP21-LAB, IDPAL and LABPAL Label Printers

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B003XU7T2G |
| Best Sellers Rank | #4,951 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #4 in Industrial Labeling Tape #1,312 in Office Electronics Accessories |
| Brand | Brady |
| Brand Name | Brady |
| Color | Black on White |
| Customer Reviews | 4.7 out of 5 stars 527 Reviews |
| Finish Type | Matte |
| Included Components | 1 Cartridge |
| Item Shape | Rectangular |
| Item Weight | 0.06 Kilograms |
| Manufacturer | Brady |
| Material | Polyolefin |
| Material Type | Polyolefin |
| Number of Labels | 1 |
| Shape | Rectangular |
| Size | .335" |
| UPC | 013227032662 662820899945 |
| Unit Count | 7.0 Feet |

## Product Details

- **Brand:** Brady
- **Color:** Black on White
- **Finish Type:** Matte
- **Material:** Polyolefin
- **Size:** .335"

## Images

![Authentic (M21-187-C-342) PermaSleeve Heat Shrink Tubing for Control and Electrical Panels, Wire Harness, Black on White-For M210, M210-LAB, M211, BMP21-PLUS and BMP21-LAB Printers, .335" W 7' L - Image 1](https://m.media-amazon.com/images/I/61obTRw2iVL.jpg)

## Available Options

This product comes in different **Color, Size, Style** options.

## Questions & Answers

**Q: Which on will work for labeling coax rg-6?**
A: Hello, 

Thank you for your inquiry.  The specific part referenced 
#M21-250-C-342 will work on the following.  3:1 heat shrinking sleeve designed for 16 - 8 gauge (diameter 0.094 - 0.215 inches, 2.4 - 5.5 mm).  I hope this is the answer you were looking for.  If not can you please re-state the question.

**Q: It says at the title that the width is 0.335" and in the specifications 0.187" (Im looking for the second one) but I have this problem with the specs?**
A: This is a shrink tube. Total length is 7', tube width a little over a 5/16". I'm not sure what is .187" indicating.

**Q: Wich one of these is able to slip over the LC Fiber connector and shrink down onto the fiber patch cable?**
A: Thank you for your inquiry.  The M21-250-C342 has a starting diameter or 0.415" before shrinking.  The correct tubing would depend on the specific connector.

**Q: will .335 shrink down onto a 18 gauge wire with jacket ?**
A: Thanks for your inquiry.  3:1 heat shrinking sleeve designed for 22 - 16 gauge (diameter 0.046 - 0.11 inches, 1.2 - 2.8 mm).  I hope this helps.  If you need more information please let me know.

## Customer Reviews

### ⭐⭐⭐⭐⭐ PermaSleeve Label
*by I***T on October 7, 2025*

I received my Brady label as of October 7, 2025, it has a yellow color, fits perfectly for my Brady M210 labeller, I hope this will fit to any sleeve, I recommend buying this from Brady its quite pricy for a label but its genuine, you get what you paid for!

### ⭐⭐⭐⭐⭐ Awesome product
*by A***R on January 3, 2026*

Great for numbering or lettering cables!

### ⭐⭐⭐⭐⭐ Perfect wire labeling
*by R***G on June 20, 2020*

I got my new Brady permasleeve labeling, M21-187-C-342, and it works great. It fit well on shielded 22GA, 3 conductor wire and shrank to fit mil-spec 20 gauge. I am happy that it handles 3 rows of text, albeit very small after shrinking, but it’s there and clear to read. For my labeling, I find my labels are all 1" to 1 1/8", so you can get about 76 labels out of a roll at that length. They are very easy to make, apply and appear to hold up well. Recommended.

## Frequently Bought Together

- Brady Authentic (M21-187-C-342) PermaSleeve Heat Shrink Tubing for Control and Electrical Panels, Wire Harness, Black on White-For M210, M210-LAB, M211, BMP21-PLUS and BMP21-LAB Printers, .335" W 7' L
- Brady Authentic (M21-500-595-WT) All-Weather Vinyl Label for Indoor/Outdoor ID, Lab and Equipment Labeling, Black on White- For M210, M210-LAB, M211, BMP21-PLUS and BMP21-LAB Printers, .5" W 21' L

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-17*