---
product_id: 197177774
title: "Crafter Blue CB03 20mm Watch Strap Curved End Rubber Band Replacement for Seiko MM300 MarineMaster SBDX001, SBDX003, SBDX005, SBDX017, SBDX021(SLA019J1), SBDX025, SBDX023, SLA023J1(SLA021J1) etc"
brand: "crafter blue"
price: "KD 29.63"
currency: KWD
in_stock: true
reviews_count: 12
category: "Crafter Blue"
url: https://www.desertcart.com.kw/products/197177774-crafter-blue-cb03-20mm-watch-strap-curved-end-rubber-band
store_origin: KW
region: Kuwait
---

# 20mm lug width perfect fit 145mm length with ergonomic taper Pure vulcanized rubber, oil & acid resistant Crafter Blue CB03 20mm Watch Strap Curved End Rubber Band Replacement for Seiko MM300 MarineMaster SBDX001, SBDX003, SBDX005, SBDX017, SBDX021(SLA019J1), SBDX025, SBDX023, SLA023J1(SLA021J1) etc

**Brand:** crafter blue
**Price:** KD 29.63
**Availability:** ✅ In Stock

## Summary

> ⌚ Elevate your Seiko game with the ultimate rubber strap upgrade!

## Quick Answers

- **What is this?** Crafter Blue CB03 20mm Watch Strap Curved End Rubber Band Replacement for Seiko MM300 MarineMaster SBDX001, SBDX003, SBDX005, SBDX017, SBDX021(SLA019J1), SBDX025, SBDX023, SLA023J1(SLA021J1) etc by crafter blue
- **How much does it cost?** KD 29.63 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/197177774-crafter-blue-cb03-20mm-watch-strap-curved-end-rubber-band)

## Best For

- crafter blue enthusiasts

## Why This Product

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

## Key Features

- • **Trusted by Enthusiasts:** Top-rated choice for MM300 owners craving style and performance in one strap.
- • **Easy Upgrade, No Hassle:** Compatible with original Seiko buckles—just swap and elevate your watch instantly.
- • **Durability Meets Comfort:** Crafted from vulcanized rubber that resists oils and acids, built to last through every adventure.
- • **Optimized Length & Thickness:** 145mm strap length with a tapered 4.5mm to 3.5mm thickness for all-day wearability.
- • **Precision Fit for Seiko MM300:** Curved end design ensures seamless integration with iconic MarineMaster models.

## Overview

The Crafter Blue CB03 is a 20mm curved end rubber watch strap designed specifically for Seiko MarineMaster MM300 series. Made from pure vulcanized rubber, it offers superior resistance to oils and acids while maintaining exceptional comfort. With a total length of 145mm and a tapered thickness, it fits perfectly with original Seiko buckles (not included), making it the go-to replacement strap for discerning watch enthusiasts.

## Description

Shop cell phones and accessories at desertcart.com. You'll find great prices on cases, headsets, and the latest smartphones from carriers like Verizon, AT&T, and Sprint

Review: Best rubber strap for the MM300 - Fantastic strap, very well designed. Extremely comfortable. Fits the MM300 case and clasp perfectly. I love it
Review: Awesome mm300 rubber strap! - Wanted a rubber strap and still utilize Seiko clasp from the OEM bracelet. This thing looks, fits and feels great and easy to install. Need to buy the orange one now!

## Features

- CRAFTER BLUE CB03 20mm curved end watch strap replacement watch band for Seiko MM300
- 20mm rubber watch strap compatible with Seiko MarineMaster SBDX001, SBDX003, SBDX005, SBDX017, SBDX021 (SLA019J1) and SBDX023 (SLA021J1), SBDX025, SLA023J1
- Lug width: 20mm; Buckle size: 18mm; Note: Buckle is NOT included, please use your original buckle.
- The NBR CRAFTER BLUE rubber strap is made of pure vulcanized rubber which has superior strength and more resistant than natural rubber to oils and acids
- Overall Length: 90mm + 55mm (Strap length:145mm / 5.71"); Thickness: Approx. 4.5mm - 3.5mm; Spring bar hole dia.: 2.50mm

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN  | B0DM5T1JLM |
| Best Sellers Rank | #1,267,369 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #1,294 in Women's Watch Bands #2,629 in Men's Watch Bands |
| Customer Reviews | 3.8 3.8 out of 5 stars (34) |
| Date First Available  | November 6, 2024 |
| Department  | Unisex Adult |
| Manufacturer  | CRAFTER BLUE |

## Images

![Crafter Blue CB03 20mm Watch Strap Curved End Rubber Band Replacement for Seiko MM300 MarineMaster SBDX001, SBDX003, SBDX005, SBDX017, SBDX021(SLA019J1), SBDX025, SBDX023, SLA023J1(SLA021J1) etc - Image 1](https://m.media-amazon.com/images/I/51umK-3YAOL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Best rubber strap for the MM300
*by D***E on June 22, 2021*

Fantastic strap, very well designed. Extremely comfortable. Fits the MM300 case and clasp perfectly. I love it

### ⭐⭐⭐⭐⭐ Awesome mm300 rubber strap!
*by D***S on April 5, 2022*

Wanted a rubber strap and still utilize Seiko clasp from the OEM bracelet. This thing looks, fits and feels great and easy to install. Need to buy the orange one now!

### ⭐⭐⭐ Disappointing experience
*by S***. on June 11, 2021*

Good quality and material and nice feeling on the wrist. My one and only complain that unfortunately kills the whole experience is the length. The short side of the band is too short so someone with a big wrist like me (8.25”) that will use full length, always has the clasp sideways. That could have been avoided if the short side was little longer, making the band easier to size

## Frequently Bought Together

- Crafter Blue CB03 Curved End Watch Band Rubber Strap Replacement for Seiko MM300 MarineMaster SBDX001, SBDX003, SBDX005, SBDX017, SBDX021(SLA019J1), SBDX025, SBDX023, SLA023J1(SLA021J1) etc
- MiLTAT 18mm Wetsuit Ratchet Buckle Diver Extension Clasp, 316L Stainless Steel Brushed

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**Shop now:** [https://www.desertcart.com.kw/products/197177774-crafter-blue-cb03-20mm-watch-strap-curved-end-rubber-band](https://www.desertcart.com.kw/products/197177774-crafter-blue-cb03-20mm-watch-strap-curved-end-rubber-band)

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*Product available on Desertcart Kuwait*
*Store origin: KW*
*Last updated: 2026-01-22*