Specification AgeRangeDescription : Adult Brand : GOTOTOP BulletPoint1 : This is a set of 750/ 950 pieces of new O-rings seals BulletPoint2 : O-rings thickness: 0.5 mm/0.6 mm/ 0.7mm BulletPoint3 : 19 different 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 30 mm. BulletPoint4 : Comes 50 pieces of each size in a polybag (total: 50 pieces x 19 = 950 pieces) BulletPoint5 : Gaskets will stretch a couple of millimeters and will also work on watches of shapes other than round ClaspType : Buckle Color : Black Department : mens ExternallyAssignedProductIdentifier : 3767794268456 ExternallyAssignedProductIdentifier1 : 654936748323 ExternallyAssignedProductIdentifier2 : 0654936748323 GpsrSafetyAttestation : 1 IncludedComponents : Spring Bar Tool, 10pcs x 2.5mm x 30mm Watch Strap Loops ItemName : 950pcs 0.5/0.6/0.7 mm Set Sealing Rings Watch Rubber Seals Back Rubber Gasket Set (0.6mm) ItemPackageDimensions_Height : 1 centimeters ItemPackageDimensions_Length : 20 centimeters ItemPackageDimensions_Width : 14 centimeters ItemPackageQuantity : 1 ItemShape : Rectangular ItemTypeKeyword : watch-repair-tools Manufacturer : GOTOTOP Material : Rubber ModelName : hta221207hh ModelNumber : hta221207hh0073 NumberOfPieces : 950 PartNumber : Echo-060 Pattern : 0.6mm ProductDescription : Feature: This is a set of 950 pieces of new O-rings seals. O-rings thickness: 0.6 mm 19 different 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 30 mm. Comes 50 pieces of each size in a polybag (total: 50 pieces x 19 = 950 pieces) High quality rubber material, wear-resistant and resistant, This is a rubber round watch gasket that keep your watch water resistant Excellent replacements for many of the popular brand watches and non brand watches 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