ITEM NAME:Watch Accessories Assorted O-Ring Mixed Round Flat Gasket for Big Watch Crown Product Description Features: O-Ring for Watch Crown for Waterproof Watches Contains 12 popular size : 3.2 x 1.8 x0.7mm 3.25x1.75 x0.75mm 3.4x1.8 x0.8mm 3.6x1.7x0.8mm 3.8x2.2x0.8mm 4.0x2.4x0.8mm 3.1x1.6 x0.5mm 3.4x2.0x0.4mm 3.65x1.7x0.5mm 3.8x2.5x0.4mm 4.0x1.8x0.5mm 4.2x2.0 x0.4mm Quantity: 300pcs Package included: 1 x Box Assorted O-Rings.1 x Box Assorted O-Rings. O-Ring for Watch Crown for Waterproof Watches. 3.25x1.75 x0.75mm. 3.1x1.6 x0.5mm.