The item for sale is a brand new, aftermarket replacement, soft rubber, blue diver strap. It is made for IWC 3777 watch and will fit The watch with 20mm lugs. You will receive soft blue rubber strap with white thread stitching and it comes with spring bars. Made to fit IWC which takes 20mm straps This Strap is made of Highest Quality PVC Soft Rubber Size 20/18mm Length:125/80mm Thickness:5mm/4mm No logo or markings on the straps. Buckles are made of stainless steel and are interchangeable with original buckles. 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 The watch. The guide will show you how to measure the lug width opening of The watch using a ruler, how to check The 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 The business!100%