Buckle closure 【Compatibility】 Stainless steel case and Viton strap are specially designed for Casio G-shock ga2100、GA2110 or GA-B2100 watches. Please confirm your watch model and make sure the watch is genuine before buying. 【New Design Process】 Combining octagonal elements and metal concepts, adding new offshore inspiration and unique creativity, the watch is rugged and powerful, with a shocking sense of power, showing the charm of men. The case is mirror polished and finely brushed to enhance the metallic feel. During the manufacturing process, every detail is considered from the aspects of craftsmanship, design and aesthetics. 【High Quality Material】This GA2100 metal bezel is made of full 316L stainless steel material, which can be used for a long time. The Viton strap is different from the common TPU material on the market. The fluororubber strap is delicate and textured, non-allergic and does not hurt the skin. It has the characteristics of heat resistance, oxidation resistance, oil resistance, corrosion resistance and easy cleaning. 【Dimensional Data】Case size: 44mm wide, 11mm thick, strap length: 20mm, suitable for wrists ranging from 6.2 to 8.6 inches. Kit weight: 63g, about 95g when assembled into a watch. 【Package Included】Metal Case, Viton Strap, Upgrade Tools and Spare Screws. All items are in a hexagonal tin box for safer transportation. 【Installation and Tools】We come with all the necessary tools, the assembly is very simple, people with less hands-on ability can also complete it well, and the modification will not affect the waterproof function of the original watch, please use it with confidence. 【Delivery and Service】All products are shipped by Amazon. If you have any problems after receiving the goods, you are welcome to contact the merchant to solve them in time.