This o-ring watch case back seal assortment is a gasket kit for watchmakers and others who work on watch case backs. These round gaskets are made of solid tube rubber to create an airtight seal that prevents water from entering the watch case. They are flexible enough to fit not only round watch case backs but, square, rectangle and other fancy shaped case backs. This assortment includes gaskets of various sizes.
- Kit has a total of 144 pieces
- Consists of an assortment of different sized gaskets
- **Note** Gaskets are NOT marked by size
- O-rings fit a variety of watch case backs from round to square
- Maintain airtight seal
- Solid tube o-ring gaskets
- Made of rubber