Amazon.com: Watch Back Cover Seal Gaskets, Rotekt 200pcs O-Ring Waterproof Rubber Seal Watch Back Cover Seal Gaskets Repairing Tool Watch Accessories (0.6mm) : Clothing, Shoes & Jewelry
4mm - 35mm Range Available x 1mm O-Ring Watch Back Gasket Rubber Seal NBR | eBay
Outgeek Metric O-Ring Kit Rubber Washer Seals Assortment Set 950PCS Watch Back Gasket Waterproof Simple Seal Washers Set Rubber Seal Washers (0.5MM (12MM-30MM)): Amazon.com: Industrial & Scientific
Replacing the Flat Watch gasket with an O-Ring. A Step by step how to guide to keep it waterproof - YouTube
Amazon.com: 950pcs O Ring Watch Back Gasket Rubber Seal Washers Set Watch Gaskets kit Replacement O-rings Repair Parts for Watch Backs, 0.6mm : Clothing, Shoes & Jewelry