1.0mm Thick Waterproof O Ring Rubber Gasket 17mm to 40mm for Watch Caseback 10pcs/Bag W3013

1.0mm Thick Waterproof O Ring Rubber Gasket for Watch Caseback

Diameter: 17mm 18mm...39mm 40mm

10pcs/Bag for each size, please choose the size that  you need.

Package included: 1 bag