200 Sizes 1000pcs Waterproof O-Type F-Type Ring Kit Watch Back Gasket Washers

AR-609-200 Types
O-type round / F-type flat cover waterproof ring set
Thickness: 0.3-0.9mm
Sizes (O-type): 170 sizes
Sizes (F-type): 30 sizes
5 pieces per size, total 200 sizes
1000 pieces per box/set