Tinksky 20mm Waterproof Silicone Watch Band Strap with Stainless Steel Deployment Clasp Buckle (Black) Color: mainly black. Material: durable soft silicone and stainless steel. Overall length: about 7.67-inch 19.5cm; Width: about 0.75 inch 20mm. Fit for the watch with 20mm lug width. Stainless steel deployment clasp with a quick-release mechanism and safety catch, for easy to use. Waterproof design makes the watch band perfect for sports and diver's watches.