1.75mm Height Waterproof I Ring 36mm to 40mm Inner Diameter Waterproof Plastic Gasket for Watch Crystal Round Glass W0037

1.75mm Height Waterproof I Ring 36mm to 40mm Inner Diameter Waterproof Plastic Gasket for Watch Crystal Round Glass W0037

It is used on watch crystal to make the watch waterproof, NOT watch back case cover! for professional users!you have to know the exact diameter and thickness of your watch crystal before buying.

Height 1.75mm, thickness appr. 0.40mm, fits for 2.0-3.0mm thick watch crystal

Diameter(Outside Diameter. X Inner Diameter.)mm Please see below

36.8 X 36mm

37.3 X 36.5

37.8 X 37

38.3 X 37.5

38.8 X 38

39.3 X 38.5

39.8 X 39

40.3 X 39.5

40.8 X 40

1 piece per order, please choose the diameter that you need.

Package included: 1 piece * Waterproof I-ring