The item for sale is a brand new, aftermarket replacement, soft rubber, Brown diver strap for Rolex watch with curved end. It will will fit your 40mm Rolex Yachtmaster 116655 Ceramic model watch which has 21mm lugs.This Strap is made of Highest Quality PVC Soft RubberLong Part : 100mm ( 4.inch )Short Part: 80mm ( 2.4inch ) Thickness at lugs: 5mm Thickness at buckle: 2.5mmLug width: 21mmBuckle width: 18mmSmall Opening: 9mmNo logo or markings on the straps. You can shorten the strap according to the size of your wrist without any problem.You get 1 set (2) rubber straps and it comes with 2 free spring bars.Customers have commented that our straps are softer and better than the original, the best quality online.All Customers Please Read The Following Before Purchasing:Be sure to check our detailed measurement guide below or in the photos/images section of the listing to assist you with purchasing the correct parts for your watch. The guide will show you how to measure the lug width opening of your watch using a ruler, how to check your model number, and assist you with other questions you may have regarding measurement. Many watches appear the same but may be different in case size or year model. This will help to avoid any returns or exchanges. We are also an email away to assist with any questions you may have. Thank you for your business!100% Satisfaction Guarantee!We sell only the best quality replacement watch parts and accessories for your watch. Your satisfaction is guaranteed or your money back! We have been in the watch parts industry for over 50 years and have been selling online for over 20 years. Buy with confidence from a reputable seller i