Rubber, 990, 36 popular sizesProfessional or home use. No pollution, no radiation, no smell, environmental protection.Heavy-duty rubber rings can be used in applications requiring higher chemical resistance and higher temperatures than NBR.Suitable for Automotive, Automotive, Garage, Plumber, Mechanic, Workshop, Repair, Air and Gas Connections, Automotive, Doors and Windows, Appliances, Bearings, Pumps, Carriages, etc. Vehicles, Appliances, Accessories, Air Conditioning Manifolds and moreThe O-Ring Kit is packaged in a bayonet snap-on clear plastic case for identification purposes.Material: RubberColor: Green+blackQuantity: 540pcs green rubber O-ring +450 black rubber O-ringType size: 36 sizes (as shown in the picture)Packaging quantity total: 990pcs540pcs Sealing ring: (Size & Quantity)7/32 inch x 1/16 inch 40pc7/16 inch x 5/64 inch 30pc1/4 inch x 1/16 inch 40pc7/16 inch x 3/32 inch 30pc9/32 inch x 5/64 inch 40pc1/2 inch x 5/64 inch 30pc5/16 inch x 1/16 inch 40pc9/16 inch x 1/16 inch 20pc5/16 inch x 5/64 inch 40pc9/16 inch x 3/32 inch 20pc5/16 inch x 5/64 inch 40pc5/8 inch x 5/64 inch 20pc11/32 inch x 5/64 inch 40pc11/16 inch x 1/ 16 inch 20pc3/8 inch x 5/64 inch 20pc11/16 inch x 1/8 inch 20pc7/16 inch x 1/16 inch 30pc11/16 inch x 5/ 64 inch 20pc450pcs Sealing ring: (Quantity & Size)40 Pc - 3 x 1mm40 Pc - 4 x 1mm40 Pc - 4.5 x 2mm40 Pc - 5 x 2mm40 Pc - 6 x 2mm40 Pc - 6 x 2.5mm40 Pc - 6 x 3mm40 Pc - 7 x 2mm40 Pc - 8 x 2mm10 Pc - 9 x 2mm10 Pc - 10 x 2mm10 Pc -12 x 3mm10 Pc - 13 x 3mm10 Pc - 14 x 2.5mm10 Pc - 17 x 2.5mm10 Pc - 18 x 4mmSealing ring10 Pc - 20 x 2mm10 Pc - 22 x 2mmPackage Contents: 2 Set x Rubber O-Rings (495pcs)Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.