Strap for Rolex Submariner 40mm - Tang Buckle Series Vulcanized rubber strap which is precisely calibrated to fit the ALL types of Rolex Submariner. This strap utilizes "Blocked Integration" engineering, incorporating solid inserts for a flawless, motionless flush mount to the Submariner case*. - Features the Rubber B signature "T" design. - 316L Stainless Steel Tang Buckle included. - Made in Switzerland of pure vulcanized rubber.