The strap is made of high-quality rubber and leather stitching, waterproof, sweat resistant, soft and comfortable. Applicable model: Compatible with Hublot Big Bang series 19mm*25mm*22mm watch strap. Bandwidth: See detailed picture for specific dimensions. Here's what you get: a wristband, two tools, and two 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.