The watch band is made of resin, waterproof, sweat resistant, soft and comfortable. Applicable model: Compatible with Casio 0771 10330771 GW-7900-1V GW-7900B-1V G-7900-1V Watch band. Bandwidth: See detailed picture for specific dimensions. What you get: a set of wristbands, a tool, and three spring pins. After receiving the strap, please do not rush to install, first compare with your original strap and dial, determine the appropriate, and then install. If you have any questions, please feel free to leave a message to customer service, customer service will reply to you within 24 hours.