---
product_id: 59145936
title: "21.5mm Hexad Oyster 316L SS Watch Band for Seiko Tuna, Wetsuit Ratchet Buckle Brushed"
brand: "seiko replacement"
price: "$394"
currency: NZD
in_stock: true
category: "Watch"
url: https://www.desertcart.nz/products/59145936-21-5mm-hexad-oyster-316l-ss-watch-band-for-seiko
store_origin: NZ
region: New Zealand
---

# 21.5mm Hexad Oyster 316L SS Watch Band for Seiko Tuna, Wetsuit Ratchet Buckle Brushed

**Brand:** seiko replacement
**Price:** $394
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** 21.5mm Hexad Oyster 316L SS Watch Band for Seiko Tuna, Wetsuit Ratchet Buckle Brushed by seiko replacement
- **How much does it cost?** $394 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/59145936-21-5mm-hexad-oyster-316l-ss-watch-band-for-seiko)

## Best For

- seiko replacement enthusiasts

## Why This Product

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

## Description

Hexad Oyster watch bracelet is a striking new design in 2016. Each link is composed of 3 Chamfer edge solid 316L stainless steel units. Hexad Oyster is a contemporary version of the traditional Oyster bracelet, but more thick & sturdy over 100 grams. This replacement bracelet is designing for 2009 onward Seiko Tuna models such as SBBN013, SBBN00E, SBBN023, SBBN029 & SBDX016. Actual lug sizes of these 2009 onward Marinemasters are slightly less than 22mm. For this reason, we have tailor made the 21.5mm stainless steel bracelet collections. Considering the comfort and sustainability, it bends smoothly following your wrist. Well-made solid 316L stainless steel links are assembled with screws instead of flimsy pins to keep its solidity and stability. Item also included one pair of FAT spring bar (eg. generic Seiko Dia. 2.5mm spring bar) to ensure the watch band is connected securely with your watch.Item number: SS211817B041Brand Name: Hexad Oyster Lug width: 21.5mmBuckle size: 18mmBuckle Include: YesBuckle type / Buckle Finish: Brushed 316L Stainless Steel button control Diver Wetsuit Ratchet BuckleOverall Length: 190Thickness: 4.8mmSpring bar hole dia.: 2.5mm (included)Design to fit : 2009 onward Seiko Tuna models' replacement watch band?s such as SBBN013 Material: 316L Stainless Steel, all solid links include end linksColor / Finish: BrushedMax. length: 190Corresponding Min. length : 104Net Weight : 120Lug end style: Straight EndAdjustment type: Screw fixed Links + Ratchet adjust 10mmRemarks: CLASP18-017B

## Features

- Shipping Estimate : 7 - 12 Business Days within UK.
- Material: 316L Stainless Steel, all solid links include end links
- Color/Finish: Brushed Steel
- Generic 2.5mm diameter Fat stainless steel spring bars included
- Design to fit: Seiko Tuna 1000m models and watches with 21.5mm lug width

## Images

![21.5mm Hexad Oyster 316L SS Watch Band for Seiko Tuna, Wetsuit Ratchet Buckle Brushed - Image 1](https://images-eu.ssl-images-amazon.com/images/I/41Ezqqfz3OL.jpg)
![21.5mm Hexad Oyster 316L SS Watch Band for Seiko Tuna, Wetsuit Ratchet Buckle Brushed - Image 2](https://images-eu.ssl-images-amazon.com/images/I/41Pu%2B1rMaLL.jpg)
![21.5mm Hexad Oyster 316L SS Watch Band for Seiko Tuna, Wetsuit Ratchet Buckle Brushed - Image 3](https://images-eu.ssl-images-amazon.com/images/I/41jjrk%2BFHBL.jpg)
![21.5mm Hexad Oyster 316L SS Watch Band for Seiko Tuna, Wetsuit Ratchet Buckle Brushed - Image 4](https://images-eu.ssl-images-amazon.com/images/I/410d%2BPPcmTL.jpg)
![21.5mm Hexad Oyster 316L SS Watch Band for Seiko Tuna, Wetsuit Ratchet Buckle Brushed - Image 5](https://images-eu.ssl-images-amazon.com/images/I/41boeWMd1-L.jpg)

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**Shop now:** [https://www.desertcart.nz/products/59145936-21-5mm-hexad-oyster-316l-ss-watch-band-for-seiko](https://www.desertcart.nz/products/59145936-21-5mm-hexad-oyster-316l-ss-watch-band-for-seiko)

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-23*