530/270Pcs O-Type Sealing Rubber Ring Automotive Air-Conditioning Compression Confidential Seal Maintenance Rubber Accessories About this item Excellent Material: Our O-rings are made of high-quality commercial grade nitrile rubber (NBR, Buna-N), with good water resistance, oil resistance, heat resistance, sealing, corrosion resistance, abrasion resistance, and antistatic properties , To meet the needs of safe and durable use. Variety of Models: Our products have 18 different models to meet your various needs, includes these SAE sizes - 7/32x1/16, 1/4x1/16, 5/16x1/16, 7/16x1/16, 7/16x3/32, 9/16x3/32, 11/16x1/16, and 11/16x1/8 inch and these metric sizes - 6.8x1.9, 7.8x1.9, 8x2, 8.8x1.9, 11x2, 12x2, 13.9x1.8, 14x2, 15x2, and 17x2 mm. For more details, please refer to our size pictures. Wide Applications: Our products have excellent heat resistance: -40°C (-40°F) to 120°C (248°F) and are s...