1:The strap is made of high quality rubber material, waterproof, sweat resistant, soft and comfortable. 2:Replacement Fit for Patek Philippe Nautilus Series band 3:Bandwidth: Interface size 25mm13mm, the specific size see the detailed picture. 4:Here's what you get: a set of straps, 1 tools。 5: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