Selection of high quality rubber material, waterproof, sweat proof, soft and comfortable. Perfect replacement for Invicta Pro Diver 17878 17877 17879 18019 6977 6979 22311 18038 22797 6981 6983 6985 6995 Watch. Bandwidth :26mm specific size see the detailed picture. What you get: a set of straps, 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