Product Name: 20mm Compatible Rubber Strap for Rolex, Oysterflex Type B, Black, Submariner, GMT Master 2, Daytona, etc. This is a new, aftermarket compatible rubber strap for Rolex. Color: Black Compatibility: Submariner, GMT Master 2, Daytona, etc. Other models with a 20mm lug width are also compatible. Strap Size: Lug width: 20mm 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.