These nylon gaskets are made as the same specifications as the original to create an airtight seal that prevents water from entering the watch case . The nylon gasket has a groove to hold the crystal like the original. These gaskets are available in different height to accommodate dials with diamonds. Some of the higher gaskets can be used to convert the plastic crystal to sapphire crystal.
The following are the heights of the gaskets for each model
***WatchMaterial is an independent part supplier of aftermarket watch parts. WatchMaterial is not affiliated with or sponsored by Rolex® Watch U.S.A Inc. Rolex® warranty may be voided by using generic aftermarket parts.***