StrapHabit FKM rubber two-piece watch strap with quick release springbars. Available in 18mm, 19mm, 20mm, 21mm, and 22mm lug widths. Two floating keepers secure the tail end of the strap. Small ridges on the side of the strap help to secure them. Thirteen adjustment holes mean that these straps should fit well on any size wrist. The underside of the strap features a waffle pattern, and a number of holes allow for venting of the wrist. Our StrapHabit Rubber straps are extremely durable, and comfortable. The deep colors look fantastic! Quick release springbars allow you to quickly swap straps in seconds without tools. These straps are NOT silicone, they are genuine FKM rubber. They feel nearly as soft and flexible as silicone, but are much stronger, and resistant to picking up fuzz, or cracking. In the photos, you can see how flexible they are, and that they can be completely folded without stretching or cracking. Compared to traditional vulcanized rubber, FKM adds increased durability, chemical and heat resistance. Specifications Quick Release Springbars Length: 78mm/130mm (19mm, 20mm, 21mm, 22mm, 24mm)70mm/120mm (18mm) Buckle Size:-16mm (18mm straps)-18mm (19mm, 20mm, 21mm straps)-20mm (22mm straps)-22mm (24mm straps) Buckle: Brushed silver stainless steel Thickness: 3mm to 5mm The built-in quick-release spring bars have 0.8mm tips and are compatible with all watches with standard or Seiko fat lug holes. If you prefer spring bars with 1.1mm tips for your Seiko, you can find them here.