1.70mm Height Waterproof I Ring 35mm to 40mm Inner Diameter Plastic Gasket 0.4mm Width for Watch Crystal Round Glass W4049

1.70mm Height Waterproof I Ring 35mm to 40mm Inner Diameter Plastic Gasket 0.4mm Width for Watch Crystal Round Glass W4049

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.

Gasket Thickness: 1.70mm
Width: 0.4mm,  

It is used for 1.8mm-2.2mm thick watch crystal glass

Diameter(Inner Diameter.):35mm to 40mm

1 Piece per order, please choose the size that you need.

Package included: 1 piece