ITEM NAME:Large Rubber Washer O-Ring Watch Crown Waterproof Watches Seals Watch Repai S1Z7 Large Rubber Washer O-Ring Watch Crown Waterproof Watches Seals Watch Repai S1Z7 Mini O-ring for waterproof watches for waterproof watches Item Type: Repair Tools and Kits Type: Watches for Parts Model Number: O-ring Feature: watch o-ring Large head waterproof ring specifications: 3.2*1.8*0.7mm 3.25*1.75*0.75mm 3.4*1.8*0.8mm 3.6*1.7*0.8mm 3.8*2.2*0.8mm 4.0*2.4*0.8mm 3.1*1.6*0.5mm 3.4*2.0*0.4mm 3.65*1.7*0.5mm 3.8*2.5*0.4mm 4.0*1.8*0.5mm 4.2*2.0*0.4mm Quantity: 50 or so visually per specification (Note: manual assembly, possible error) Size: 8.5*5.5*1.7CM Color: Black Material: Plastic Package Contents: 600 * Watch head seal o-ring 1 * plastic box.Mini O-ring for waterproof watches for waterproof watches. Large head waterproof ring specifications Type: Watches for Parts. 600 Watch head seal o-ring. Feature: watch o-ring. Item Type: Repair Tools and Kits.