---
product_id: 197177774
title: "CB03 20mm Watch Strap Curved End Rubber Band fit for Seiko MM300"
price: "₨2084"
currency: SCR
in_stock: true
url: https://www.desertcart.sc/products/197177774-cb03-20mm-watch-strap-curved-end-rubber-band-fit-seiko
store_origin: SC
region: Seychelles
---

# 145mm total length, perfect wrist adaptability 20mm lug width precision fit Pure vulcanized rubber, oil & acid resistant CB03 20mm Watch Strap Curved End Rubber Band fit for Seiko MM300

**Price:** ₨2084
**Availability:** ✅ In Stock

## Summary

> 🕶️ Elevate your MarineMaster game with the ultimate rubber strap upgrade!

## Quick Answers

- **What is this?** CB03 20mm Watch Strap Curved End Rubber Band fit for Seiko MM300
- **How much does it cost?** ₨2084 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/197177774-cb03-20mm-watch-strap-curved-end-rubber-band-fit-seiko)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Customizable Length:** Dual strap lengths (90mm + 55mm) provide a tailored fit for wrists around 7 inches and beyond.
- • **Sporty Comfort All Day:** Thick yet flexible 4.5mm-3.5mm strap thickness ensures rugged durability without sacrificing comfort.
- • **Durable Vulcanized Rubber:** Crafted from premium NBR rubber that outperforms natural rubber in strength and chemical resistance.
- • **Original Buckle Compatible:** Designed to pair flawlessly with your Seiko’s original tang buckle for authentic style retention.
- • **Precision Fit for Seiko MM300:** Engineered with exact 20mm lug width for seamless integration with iconic MarineMaster models.

## Overview

The Crafter Blue CB03 is a 20mm vulcanized rubber watch strap designed specifically for Seiko MM300 MarineMaster models. It offers superior durability against oils and acids, a precise fit with curved ends, and a sporty yet comfortable thickness. Compatible with original buckles, this strap transforms your watch into a versatile, everyday adventure-ready accessory.

## Description

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## 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 |
|---------------|-------|
| Clasp type | Tang Buckle |
| Item type name | Watch strap |
| Material | Nbr rubber |
| Metal type | No Metal Type |

## Images

![CB03 20mm Watch Strap Curved End Rubber Band fit for Seiko MM300 - Image 1](https://m.media-amazon.com/images/I/51umK-3YAOL.jpg)

## Available Options

This product comes in different **Color** options.

## 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.sc/products/197177774-cb03-20mm-watch-strap-curved-end-rubber-band-fit-seiko](https://www.desertcart.sc/products/197177774-cb03-20mm-watch-strap-curved-end-rubber-band-fit-seiko)

---

*Product available on Desertcart Seychelles*
*Store origin: SC*
*Last updated: 2026-10-08*