Here we have a Sinn 22mm black silicone rubber strap with curved watch-side ends specifically for fitment on a Sinn EZM12 'medical professional' watch. To my knowledge this strap type will not fit other Sinn models. These are cut-to-fit straps and this item has been cut to fit a 7-7.25" wrist when worn with the EZM12 watch. It can be further cut for smaller wrists. Made from high-quality and thick silicone rubber, this strap is durable, flexible, soft and comfortable for extended use. It is a stylish and practical accessory for those looking to personalize and enhance their Sinn watch. The strap fastens with an original Sinn 22mm Tegimented stainless steel deployant clasp w dive extension. The Sinn proprietary tegimenting process leads to incredible hardness and scratch resistance, which can be seen by the excellent condition of the the item here. Twin-push-button release mechanism ensures ultimate security and easy operation. There is a built in dive extension for use over a wetsuit, jacket or flight suit. The deployant clasp will work with other Sinn 22mm rubber straps (U1, U2, UX, some 757 and 857 models, etc) Please ensure you have the correct watch for this strap prior to purchase. THE WATCH IS NOT FOR SALE. strap and clasp only. Strap for EZM12 + Tegimented deployant clasp: $375 shipped 22mm tegimented deployant clasp only: $325 shipped!