Sale
This O-ring watch case back seal assortment contains round gaskets that are made of solid tube rubber to create an airtight seal and are flexible enough to fit not only round watch case backs but, square, rectangle and other fancy shaped case backs. This new assortment is available in extra large sizes to fit the new extra large watch cases. The thicknesses are .80 mm and 1.0 mm and the inside diameters range from 33 mm to 42 mm. Refills available.
Note: Diameter measured is the interior diameter of the gasket
