【Replacement Silicone Strap for Casio GR-B300 – Bio-Resin Band for G-SHOCK Gravitymaster】 – Premium replacement strap designed for the Casio G-SHOCK GR-B300 Gravitymaster series-38. the exact specification for all GR-B300 models including GR-B300-1A4, GR-B300-8A2, and GR-B300RY-1A9--1. Crafted from high-quality materials – including bio-based resin options that match the original Casio eco-friendly construction-41. Available in multiple colors to match or customize your GR-B300’s aviation-inspired aesthetic-41. The essential replacement band for restoring or upgrading your G-SHOCK Gravitymaster.
Precision Fit for GR-B300 Gravitymaster Series – Specifically engineered for Casio GR-B300 models featuring the Carbon Core Guard structure-38.
gap-free fit on the 59×54.7×15.7mm case-38. Compatible with all GR-B300 variants – Black, Red, and Blue editions-41.
Bio-Based Resin – Eco-Friendly & Durable – The GR-B300’s key resin components, including the band, are made from bio-based resin – reducing environmental impact while maintaining G-SHOCK’s legendary durability-38-41. Unlike standard silicone that can degrade over time, bio-based resin offers: Long-lasting flexibility – resists cracking and hardening; Sweat and water resistance – ideal for active lifestyles and 200m water-resistant environments-1; Lightweight comfort – the 71g watch remains feather-light on the wrist-38.
Seamless Design – Inspired by Next-Gen Aircraft – The GR-B300 features an organic, seamless design where the case and band flow together in a unified silhouette – inspired by next-generation aircraft-38-41. This replacement band maintains that smooth, integrated look that defines the Gravitymaster series-.
Essential for Restoration & Customization – Perfect for: Replacing worn or damaged original bands – restore your GR-B300 to its original condition; Customizing your Gravitymaster look – choose from multiple colors to match your style; Completing full watch restorations – the essential band for any GR-B300 project.
Easy DIY Installation – Direct replacement for the original band. Compatible with standard spring bar tools. Professional installation recommended for best results. Band only – watch movement and case not included. Note: These are aftermarket replacement parts, not genuine Casio® parts. However, they are engineered to the same specifications as the original bio-based resin bands used in Casio GR-B300 watches.
gap-free fit on the 59×54.7×15.7mm case-38. Compatible with all GR-B300 variants – Black, Red, and Blue editions-41.
