Product Details: * Color: Green. * Material: Hydrogenated Nitrile Butadiene Rubber (HNBR). HNBR Material for Long-Lasting Service: * Hydrogenated Nitrile Butadiene Rubber (HNBR), also known as Highly Saturated Nitrile (HSN) is special class of nitrile rubber (NBR) and is for mission critical applications. * HNBR can be formulated to meet application temperatures ranging between -45 degrees C and 165 degrees C, and HNBR is classified by ASTM as DH-type polymer. * No contact corrosion, no pollution medium, no abnormal smell, environmental friendly. Stable Performance with High Standard Construction: * Full of elasticity and resilience. * The appropriate mechanical strength, including expansion strength, elongation and tensile strength, etc. * The performance is stable, not easy swelling in the medium, small heat shrinkage effect (joule effect). Full Set of 270pcs 18 Sizes O Rings for all your needs: * Assortment O-Rings with convenient resealable plastic case. * Excellent quality box set of 270pcs O-rings seals in 18 different sizes perfect for most jobs. * Direct replacement, no modification required. Professional installation is recommended. Applications: Widely used for automobile, electrical appliance, mechanical, industrial, construction, household, and other fields. Package Includes: 20pcs 7/32"×1/16"or (5.29×1.78) 20pcs 1/4"×1/16"or (6.07×1.78) 20pcs 6.8×1.9 20pcs 5/16"×1/16"or (7.65×1.78) 20pcs 7.8×1.9 20pcs 8×2 20pcs 8.8×1.9 15pcs 7/16"×1/16"or (10.82×1.78) 15pcs 7/16"×3/32"or (10.77×2.62) 15pcs 11×2 15pcs 12×2 10pcs 13.9×1.8 10pcs 9/16"×3/32"or (13.95×2.62) 10pcs 14×2 10pcs 15×2 10pcs 17×2 10pcs 11/16"×1/16"or (17.17×1.78) 10pcs 11/16"×1/8"or (17.04×3.53)