3PCS Height 0.8mm-1.75mm Waterproof I-ring Watch Crystal Gasket 8.5mm-40mm F9580
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
Height 0.9mm, thickness appr. 0.45mm, fits for 1.0-1.5mm thick watch crystal
Height 1.25mm, thickness appr. 0.40mm, fits for 1.5-2.0mm thick watch crystal
Height 1.75mm, thickness appr. 0.40mm, fits for 2.0-3.0mm thick watch crystal
INNER Diameter:
8.5/9.5/10.5/11/11.5/12/12.5/13/13.5/14/14.5/15/15.5/16/16.5/17/17.5/18/18.5/19/19.5/20/20.5/21/21.5/22/22.5/23/23.5/24/24.5/25/25.5/26/26.5/27/27.5/28/28.5/29/29.5/30/30.5/31/31.5/32/32.5/33/33.5/34/34.5/35/35.5/36/36.5/37/37.5/38/38.5/39/39.5/40MM
Please note that this is inner diameter, NOT outside diameter
Package included: 3 pieces