0.9mm Height Waterproof Watch Crystal I-ring Plastic Glass Gasket Inner Diameter 19.5mm to 29mm

Height 0.9 Waterproof I-ring Gasket for Watch Crystal 19.5mm-29mm

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 0.9mm, thickness appr. 0.45mm, fits for 1.0-1.5mm thick watch crystal

INNER Diameter:

19.5/20/20.5/21/21.5/22/22.5/23/23.5/24/24.5/
25/25.5/26/26.5/27/27.5/28/28.5/29, Please note that this is inner diameter, NOT outside diameter

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

Package included: 1 piece * Waterproof I-ring