【18 Sizes of Sealing Washers】 Contains 18 popular sizes of flat O-ring washers, a total of 141 pieces. Refer to the image for the specific size and quantity of each size. 【2 Types of Washers】 The set contains 8 sizes of rubber washers and 10 sizes of fiber gaskets. The rubber washer is made of acrylonitrile-butadiene rubber, which has good wear and aging resistance, and aAirtight. The fiber gasket is suitable for plumbing and as a sealant, forming a watertight seal and absorbing friction and wear. 【Classified Storage】 The boxes with compartments and size tables match the joints for easy storage and use. 【Wide Application】 Ideal for plumbing, automotive, engineering, air conditioning manifolds, chemical pipelines, cylinders, appliances, bearings, pumps, pulleys, etc. 【Warranty】 If you have any problems after receiving the goods or during use, please do not hesitate to contact us, we will resolve it for you within 24 hours.Product DescriptionProduct model: 141 pieces of rubber sealing washers in 18 sizes Color: black and redMaterial: rubber and fiberThe black rubber washer is made of acrylonitrile-butadiene rubber, which has good wear resistance, aging resistance and airtightness.The red fiber gasket is suitable for plumbing and as a buffer, forming a watertight seal and absorbing friction and wear.Package contents:Washer Black Rubber Washer 60 PCS:10 pieces, 4 x 17 x 4 mm10 pieces, 4 x 16 x 4 mm 10 pieces 12 x 24 x 2 mm10 pieces, 15 x 24 x 3 mm5 pieces, 8 x 18 x 4 mm5 pieces, 8 x 14 x 4 mm 5 pieces 9.5 x 17.5 x 4 mm 5 pieces 10.5 x 14 x 4 mm 81 PCS Red Fiber Joint:10 pieces, 10 x 13.5 mm 10 pieces 12 x 17.5 mm * 10 pieces 12 x 17.5 mm *10 pieces, 17 x 21 mm10 pieces 17 x 24 mm *10 pieces 17 x 24 mm **10 pieces, 20.5 x 25 mm5 pieces, 27 x 33 mm3 pieces, 30 x 39 mm3 pieces, 27 x 38 mmThere is a slight difference in thickness between * and **.Package weight: 160gApplication: Ideal for plumbing, automotive, engineering, air conditioning manifolds, chemical pipelines, cylinders, appliances, bearings, pumps, pulleys, etc.Warranty: If you have any questions about the product, please contact us, we will resolve it for you within 24 hours.