The item for sale is a Quality, aftermarket replacement replacement, Italian Genuine Leather matte finish strap with stitching and comes with installed Daytona Clasp on your strap. It is made for Rolex Daytona 16518 16519 16520 16523 116518 116519 116520 116523 watch which has 20mm at lugs with 16mm at buckle.These premium quality grain leather straps with thick 5.5mm padding with nice soft finish on back for added comfort with genuine nubuck waterproof leather lining with sweat resistant on back side of the strap for long lasting and durability of the strap with extra comfort and nice and expensive just look like the original.It will fit your Rolex Daytona clasp which is 16mm opening on both sides.Regular Length:Long part: 7.5cm ( 3 inch )Short part: 6.5cm ( 2 1/2 inch ) Short Length:Long part: 6.5cm ( 2 1/2inch )Short part: 5.5cm ( 2 1/8 inch ) Thickness: 5.50mmLug Width: 20mmEnd Width: 16mmYou get one set (2) Quality genuine leather straps and it comes with 316L Daytona Clasp installed and 2 free spring bars.with clasp or without it and they are listed in our store for you to purchase.All Customers Please Note: Be sure to check your watch model number and the lug width opening using the mm side of a ruler and make sure it matches the lug width mentioned in the description of our listing. 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. Thank you for your business!