1:The strap is made of high quality silicone material, waterproof, sweat resistant, soft and comfortable. 2:Adaptation model: Compatible with Citizen 23mmBN0191-80L BN-019317E BN0190 0193 CA0718 0710 NY0070 and other models. 3:Bandwidth: Interface size 25mm13mm, the specific size see the detailed picture. 4:Here's what you get: a set of straps, a tool, and three spring bars. 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"