Precision replacement case back waterproof O-ring (50103) for Rolex.
Made of rubber through special processing, soft and durable.
9 different sizes for different type of Rolex watch.
Each size has 5 pcs in a small bag.
Total 45pcs are collected in one environmental friendly plastic box.
All of our Replacement gaskets for Rolex are the finest quality.
A must replacement when you open the case back to keep your Rolex watertight
Ideal watch parts for watchmakers and watch hobbyists.