Product Name: 21mm Compatible Rubber Strap for Rolex - Black Oysterflex Type C - Submariner, Yacht-Master II, Datejust 41, etc. This is a new, aftermarket compatible rubber strap for Rolex. Compatible with: Submariner (12661* series) Yacht-Master II (11668* series) Datejust 41 (12633* series), etc. Also suitable for other models with a 21mm lug width. Color: Black Size: Lug width: 21mm Length: Approximately 85mm/55mm *The 85mm side can be shortened by cutting the groove. The curved design of the strap provides a comfortable fit on the wrist. For Glide-lock clasp type (Submariner models using 9mm screws on both sides, etc.), please note that belt modification (custom cut) is required for the buckle attachment. *This product includes the strap only. Please note that the watch body is not included in the example images.