0.8mm Height Waterproof Watch Crystal I-ring Plastic Glass Gasket Inner Diameter 36mm to 40mm

0.8mm Height Waterproof Watch Crystal I-ring Plastic Glass Gasket Inner Diameter 36mm-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 correct diameter

Package included: 1 piece