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 for each sizes, total 200 sizes
1000 pieces per box/per set