MATERIAL: High quanlity NBR ring with carbon steel, good sealing. Anti static, high pressure resistant, oil resistant, corrosion resistant, UV resistant, heat resistant, wear resistant, durable and long service life. Quantity: 12 Sizes,240 Pieces rubber metal combination O Ring gaskets, meet almost all your needs.PRODUCT FEATURE: Reliable low and high pressure sealing, High and low temperature capabilities, Bolt torque is reduced with no loss of tightening load. Bonded washers are used extensively for sealing under the heads of bolts in high pressure applications where coppers washers would be unsuitable. They are often used in hydraulic and pneumatic connections that are subject to extreme pressures.WIDE APPLICATION: Oil pipeline system as a medium, for mechanical device, to prevent oil, fuel, water and gas leakage, etc. Great for high pressure fuel systems, brake caliper banjo bolt, brake master cylinder, fuel line bolts and water line bolts in turbos, automotive replacement drain plug gaskets, etc.EASY TO USE PACKING: All O-rings are stored in a sturdy plastic box with labels, that avoids the trouble of sorting and selecting the size. Variety of thickness and size are all in one box, very convenient to use.INTERNAL DIAMETER: Φ6(6mm), Φ8(8mm), Φ10(10mm), Φ12(12mm), Φ14(14mm), Φ16(16mm), Φ18(18mm), Φ20(20mm), Φ22(22mm), Φ24(24mm), Φ27(27mm), Φ30(30mm). 【Metric, Please See Picture 2 for Specific Dimensional Size】 Product Description KOOTANS High Quality Dowty Type Bonded Seal O Ring Washer Assortment Set Product description: - 240 Pieces, 12 Popular Sizes Bonded O-Ring Sealing Gasket Washer, Meet almost all your needs. - With KOOTANS bonded washers set you can always make sure every leak is fixed! Features: - Great for high pressure fuel systems, brake caliper banjo bolt, brake master cylinder, fuel line bolts and water line bolts in turbos, automotive replacement drain plug gaskets, etc. - Eliminate Seal Offset - Eliminate Leaks - Ease of Installation - Reduce Assembly time - This kit is organized by size / type in a transparent storage case for quick access and protection. Specifications: - Material: Nitrile rubber + carbon steel - Package: 12 Sizes 240pcs bonded washers in a storage box - Application: Industry and science, home pipes, automotive and other fields. - Size and Quantity: Metric, Please See Picture 2 for Specific Dimensional Size. There are 20 pieces in each size. GOOD SEALING High quality nitrile rubber + carbon steel LONG SERVICE LIFE Anti static, high pressure resistant, oil resistant, corrosion resistant, UV resistant, heat resistant and wear resistant. MULTI - SIZE 240 Pieces, 12 Popular Sizes Bonded O-Ring Sealing Gasket Washer, Meet almost all your needs Oil pipeline system as a medium, for mechanical device, to prevent oil, fuel, water and gas leakage, etc. Great for high pressure fuel systems, brake caliper banjo bolt, brake master cylinder, fuel line bolts and water line bolts in turbos, automotive replacement drain plug gaskets, etc. Quantity 1225 PCS O RING KIT 1200 PCS O RING KIT 1 COMPLETE KIT