0.8mm Height Waterproof Watch Crystal I-ring Plastic Gasket Inner Diameter 16mm to 25.5mm for Glass 0.8mm-1.5mm Thick

Height 0.8 Waterproof I-ring Gasket for Watch Crystal 16-40mm

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 0.8mm, thickness appr. 0.35mm,  fits for 0.8-1.5mm thick watch crystal

INNER Diameter:

16/16.5/17/17.5/18/18.5/19/19.5/20/20.5/21/21.5/22/22.5/23/23.5/24/24.5/25/25.5/26/26.5/27/27.5/28/28.5/29/29.5/30/30.5/31/31.5/32/32.5/33/33.5/34/34.5/35/35.5/36/36.5/37/37.5/38/38.5/39/39.5/40MM

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