Product Name: 21mm Compatible Rubber Strap for Rolex - Black Oysterflex Type C - Submariner, Yacht-Master II, Datejust 41, etc. 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 lug (strap) width of 21mm. 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 two 9mm screws, etc.), please note that belt modification (custom cut) is required for the part that attaches to the buckle. *This product is for the strap only. Please note that the watch body is not included in the example images.