Brand New 300pcs Round Watch Crown O RingSpecification Material RubberQuantity about 300Pcs30pcs for each size as following 1 4mm 1 45mm 1 5mm 1 6mm 1 7mm 1 8mm 1 9mm 2 0mm 2 4mm 2 8mmFeatures This is a rubber O Ring round watch gasket that keep your watch water resistant Made of rubber material and of fair quality Every size come in separate about 30pcs each size in a grid Are excellent replacements for many of the popular brand watches like Orient Sekio Cassio Omega etc and also for non brand watch This is excellent for most watches especially if you are doing watch battery replacement Gaskets will stretch a couple of millimeters and will also work on watches of shapes other than round Package Included 300Pcs O Ring Watch Crown Rubber Seal