These spring bars are exact replacements for the Rolex Sea-Dweller 4000 (40mm wide case), that was in production from 2014-2017. The Rolex Model reference is 116600. Everest offers sets of Rolex replacement spring bars for different Rolex models. The spring bars are custom made to the exact tolerance, size and quality that Rolex uses. The spring bars offer Rolex owners an affordable option for replacement spring bars. The spring bars measure 1.8mm thick by 20.0mm long.