Rubber, 495, 36 popular sizes or home use. No pollution, no radiation, no smell, environmental protection. Heavy-duty rubber rings can be used in applications requiring higher chemical and higher temperatures than NBR. Suitable for Automotive, Automotive, Garage, Plumber, Mechanic, Workshop, Repair, and Gas Connections, Automotive, Doors and Windows, Appliances, Bearings, Pumps, Carriages, etc. Vehicles, Appliances, Accessories, Conditioning Manifolds and more The O-Ring Kit is packaged in a bayonet snap-on clear plastic case for identification purposes. Material: Rubber Color: Green+black Quantity: 270pcs green rubber O-ring +225 black rubber O-ring Type size: 36 sizes (as shown in the picture) Packaging quantity : 495pcs 270pcs Sealing ring: (Size & Quantity) 7/32 inch x 1/16 inch 20pc 7/16 inch x 5/64 inch 15pc 1/4 inch x 1/16 inch 20pc 7/16 inch x 3/32 inch 15pc 9/32 inch x 5/64 inch 20pc 1/2 inch x 5/64 inch 15pc 5/16 inch x 1/16 inch 20pc 9/16 inch x 1/16 inch 10pc 5/16 inch x 5/64 inch 20pc 9/16 inch x 3/32 inch 10pc 5/16 inch x 5/64 inch 20pc 5/8 inch x 5/64 inch 10pc 11/32 inch x 5/64 inch 20pc 11/16 inch x 1/ 16 inch 10pc 3/8 inch x 5/64 inch 10pc 11/16 inch x 1/8 inch 10pc 7/16 inch x 1/16 inch 15pc 11/16 inch x 5/ 64 inch 10pc 225pcs Sealing ring: (Quantity & Size) 20 Pc - 3 x 1mm 20 Pc - 4 x 1mm 20 Pc - 4.5 x 2mm 20 Pc - 5 x 2mm 20 Pc - 6 x 2mm 20 Pc - 6 x 2.5mm 20 Pc - 6 x 3mm 20 Pc - 7 x 2mm 20 Pc - 8 x 2mm 5 Pc - 9 x 2mm 5 Pc - 10 x 2mm 5 Pc -12 x 3mm 5 Pc - 13 x 3mm 5 Pc - 14 x 2.5mm 5 Pc - 17 x 2.5mm 5 Pc - 18 x 4mmSealing ring 5 Pc - 20 x 2mm 5 Pc - 22 x 2mm Package Contents: 1 Set * 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.