These spring bars are exact replacements for the Rolex Explorer I 39mm, that was in production from 2010 - 2021. The Rolex Model reference is 214270. 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.