This 16mm, 18mm, 19mm, 20mm, 21mm or 22mm wide 1 piece nylon watch strap is called a Military MoD Ballistic Nylon watch band. It is often worn by military personal, police, and divers. This one-piece 16mm, 18mm, 19mm, 20mm, 21mm or 22mm wide watch band weaves through both lugs of the watch and under your watch. If one spring bar breaks, the remaining spring bar will hold the strap and your watch to your wrist. Great safety feature if you are active. Shiny, stainless-steel buckle and keeper rings. Width at the lug end of the watch is 16mm, 18mm, 19mm, 20mm, 21mm or 22mm wide. Thickness is about 1.2mm. Length = 10.5" (if too long the end can be cut and sealed with a lighter)