950PCS 0.5MM Round O Ring Watch Back Gasket Rubber Seal Washers Size 12-30mm WTL057 Sold by AMPM24 Store. Package Includes:1 x Leather Watch Box This is a set of 950pcs. new o-rings gaskets. Use for watch repair and must have a watch maker all sizes. You will receive following sizes from 12 to 30 mm: 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 and 30mm. Color may not appear as exactly as in real life due to variations between the computer monitors and nacked eye color difference. You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it!