---
product_id: 601495894
title: "6 in. x 25 ft. Insulated Flexible Duct R4.2 Silver Jacket, 6 - Flexible Ductwork - Ducting & Venting"
brand: "cuchiilo"
price: "$354"
currency: NZD
in_stock: true
reviews_count: 8
category: "Cuchiilo"
url: https://www.desertcart.nz/products/601495894-6-in-x-25-ft-insulated-flexible-duct-r4-2
store_origin: NZ
region: New Zealand
---

# Up to 85% noise reduction with sound-absorbing glass wool R-4.2 insulation rating for superior thermal efficiency 6-inch diameter for versatile HVAC fit 6 in. x 25 ft. Insulated Flexible Duct R4.2 Silver Jacket, 6 - Flexible Ductwork - Ducting & Venting

**Brand:** cuchiilo
**Price:** $354
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay cool, quiet, and efficient with ducting that works as hard as you do!

## Quick Answers

- **What is this?** 6 in. x 25 ft. Insulated Flexible Duct R4.2 Silver Jacket, 6 - Flexible Ductwork - Ducting & Venting by cuchiilo
- **How much does it cost?** $354 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/601495894-6-in-x-25-ft-insulated-flexible-duct-r4-2)

## Best For

- cuchiilo enthusiasts

## Why This Product

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

## Key Features

- • **Quiet Comfort Guaranteed:** Fluffy glass wool absorbs sound, reducing noise by up to 85%.
- • **Flexible & Durable Design:** Bend and install effortlessly without rigid elbows or retraction.
- • **Multi-System Compatibility:** Ideal for HVAC, fresh air, and mechanical ventilation without corrosive gases.
- • **Thermal Performance That Saves:** R-4.2 rating keeps your environment perfectly climate-controlled.
- • **Premium Owens Corning Glass Wool:** Industry-trusted insulation with high corrosion and flame resistance.

## Overview

This 6-inch by 25-foot insulated flexible duct features a robust aluminum foil jacket and high-strength spiral steel wire core, wrapped in Owens Corning glass wool insulation rated R-4.2. Engineered for HVAC systems, it offers exceptional thermal resistance (-4℃ to 454℃), superior noise reduction up to 85%, and flexible installation without loss of shape or airflow efficiency.

## Description

6 in. x 25 ft. Insulated Flexible Duct R4.2 Silver Jacket, 6 - Flexible Ductwork - Ducting & Venting - desertcart.com

Review: It’s Ducting—And It Does Exactly What Ducting Should - Not much to say here: it’s 6" insulated flexible ducting, and it did the job perfectly. Easy to work with, solid insulation, and exactly what I needed for my project. Sometimes you just need something that works without any drama—and this delivered. Five stars!
Review: Tough Enough if you're careful - The inner "foil" layer was much tougher than another reviewer said. It's more of a "mylar" plastic silver mirror kind of material. I only needed 15 to 17 feet, so I didn't mind ruining the end I attached to a rope for pulling through the hordes of black widows and rattlers. The insulation is as expected. I did tear the outer layer just a tiny bit pulling it with a rope I'd fish-taped through a confined crawlspace trench I had to hand-excavate. Attaching it firmly to the flanges worked well however the Hose Clamp, or Radiator Clamp style items supplied were some metric size I had no socket bit for. So, picture a guy on his back in dirt with spider webs hanging down trying to use a flathead driver on his drill to tighten a long long long clamp. One spider said: Hey, how-ya-doin?" I have patience. I attached it to one flange from inside the home, the other from underneath. Both ends were easier than expected. This is a quality product, but fragile as you might imagine. Be careful of it and it's tough enough and a good value.

## Features

- 【🌿🛒High-quality performance 6 insualted duct】Made of thickened aluminum foil material and made of high-strength elastic spiral steel wire.The middle is covered with glass fiber insulation layer, which has high temperature resistance, acid and alkali resistance, and flame retardancy.
- 【🌿🛒Owens Corning Glass Wool Insualtion 】Glass wool Insualtion is the safest building material, with high corrosion resistance and thermal insulation,R value: R-4.2. The temperature resistance range is -4℃~454℃.
- 【🌿🛒Sound absorption and noise reduction insulation】 The internal structure of glass wool insulationis fluffy and the overall density is large, which can absorb the sound in time,Noise can be reduced by up to 85%.
- 【🌿🛒6 inch Flexible Duct】 It can be bent arbitrarily, without rigid elbows, the aluminum foil is self-sustaining and will not retract after installation.It can maintain the flatness in the tube and reduce the wind resistance.
- 【🌿🛒Multi Function】Used for high, medium and low pressure ventilation system without corrosive gas. Mainly used in central air conditioning HVAC system,Fresh air ventilation systems, mechanical equipment recovery systems and other ventilation systems that do not contain corrosive gases, etc.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Cuchiilo |
| Manufacturer | Cuchiilo |
| Material | Aluminum, Fiberglass |
| Product Dimensions | 300"L x 6"W |
| Recommended Uses For Product | ventilation systems, air conditioning, and heating systems |

## Product Details

- **Material:** Aluminum, Fiberglass
- **Brand:** Cuchiilo
- **Recommended Uses For Product:** ventilation systems, air conditioning, and heating systems
- **Product Dimensions:** 300"L x 6"W
- **Manufacturer:** Cuchiilo

## Images

![6 in. x 25 ft. Insulated Flexible Duct R4.2 Silver Jacket, 6 - Flexible Ductwork - Ducting & Venting - Image 1](https://m.media-amazon.com/images/I/71WBnYiYrLL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ It’s Ducting—And It Does Exactly What Ducting Should
*by D***N on November 28, 2025*

Not much to say here: it’s 6" insulated flexible ducting, and it did the job perfectly. Easy to work with, solid insulation, and exactly what I needed for my project. Sometimes you just need something that works without any drama—and this delivered. Five stars!

### ⭐⭐⭐⭐⭐ Tough Enough if you're careful
*by M***K on December 17, 2024*

The inner "foil" layer was much tougher than another reviewer said. It's more of a "mylar" plastic silver mirror kind of material. I only needed 15 to 17 feet, so I didn't mind ruining the end I attached to a rope for pulling through the hordes of black widows and rattlers. The insulation is as expected. I did tear the outer layer just a tiny bit pulling it with a rope I'd fish-taped through a confined crawlspace trench I had to hand-excavate. Attaching it firmly to the flanges worked well however the Hose Clamp, or Radiator Clamp style items supplied were some metric size I had no socket bit for. So, picture a guy on his back in dirt with spider webs hanging down trying to use a flathead driver on his drill to tighten a long long long clamp. One spider said: Hey, how-ya-doin?" I have patience. I attached it to one flange from inside the home, the other from underneath. Both ends were easier than expected. This is a quality product, but fragile as you might imagine. Be careful of it and it's tough enough and a good value.

### ⭐⭐⭐⭐⭐ GREAT VALUE
*by J***. on November 19, 2025*

WORKED GREAT

## Frequently Bought Together

- Cuchiilo 6 Inch 25 Feet Insulated Flexible Duct R4.2,Flex Duct Insulated, for Heating and Air Conditioning HVAC Systems
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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-03-08*