Features:It is made for Rolex Datejust Oyster Perpetual 16233 16234 16238This is a top quality sapphire crystal made to exact specifications and size as the original.This crystal has no lens effect. Most of the cheaper ones have a very bad lens effect.This sapphire crystal comes with pressure resistant nylon gasket,It will fit your watch just like the original and your watch will be waterproof.Package include:1* sapphire crystal with gasket