This is a rubber strap featuring a quick-release spring bar, made from the new material FKM RUBBER. It's a reproduction of the professional diver's strap most loved by divers in the 1960s and 70s. The original used isoprene (natural rubber) material, which revolutionized diving belts. It was also officially adopted by numerous manufacturers such as OMEGA and HEUER, and received overwhelming support from professionals. The strap's design, which incorporates ventilation holes, has been reproduced, and the material has been upgraded for its revival. By using the best fluororubber FKM material, the strap is more flexible, stronger, and more comfortable to wear. It is made with non-allergenic materials and excellent durability, using a special manufacturing process that does not contain any silicone. This material is fluororubber and is a high-quality material also used in O-ring packings for automobiles and other applications that require high durability. It is also very excellent in oil resistance, chemical resistance, heat resistance, flame resistance, weather resistance, and ozone resistance, making it a very suitable material for straps. In recent years, it has been officially adopted by many famous brand manufacturers for their genuine rubber straps. You will enjoy a comfortable fit with a soft touch feel while having moderate firmness. All metal parts, including the quick spring bar, are made of highly durable 316L stainless steel. It is a rubber strap that is simple yet functional and will suit any wristwatch. Color: BLACK Strap Width: 20mm Buckle Attachment Width: 20mm Thickness from the spring bar area of the watch attachment: Approximately 5.5mm to approximately 3.5mm (tapered) Buckle side length: Approximately 75mm (size does not include buckle) Tip side length: Approximately 125mm The watch body in the image is a sample used for photography and is a wearing example. The watch body is not included in the listed strap. "Search terms" Tropic Submariner Seamaster Speedmaster rxw wmt sub ISOFRANE Isofrane ISOfrane