Special material: The strap is made of high-quality rubber material, which is more comfortable and durable than ordinary rubber material, and the interior has a breathable convex design. Suitable model: Interface size 20mm, compatible with Seiko, Tudor, Omega and Seiko, etc. Great alternative model, compatible with Rolex Rubber series Submersible GMT Explorer & oysterpertual Suitable wrist size: Wrist width: 20mm, short wrist: 60mm/2.36 ""Long wrist: 84mm/3.31"", can fit around 7.2 ""to 9.1"" * Note: Long wrist length can be cut to at least 2.16"", but cannot be reversed! Check the dimensions before cutting Buckle process and material: The buckle is made of high-quality stainless steel, corrosion resistant. * Note: the buckle will be tight when used for the first time, which is a normal phenomenon, it will return to normal during daily use, in fact, most watches have sharp edges, but we will still repair according to customer suggestions, and continue to improve according to customer needs. What you received: beautiful box packaging, and rubber strap *1 + 3 spring bar + 2 remover (red screwdriver for removing the buckle, original spring bar recommended), removable or removable.