Premium quality product. For car, door, window, electrical appliance, bearing, pump, support roller. O-ring assortment with practical resealable plastic case . A total of 18 most popular sizes. Hydrogenated nitrile (HNBR), also known as highly saturated nitrile (HSN) is a special class of nitrile rubber (NBR) and is intended for critical applications. HNBR can be formulated to meet application temperatures ranging from -45C to 165C, and HNBR is rated by ASTM as DH type polymer. Material: rubber. Case color: green. Carton dimensions (L x W x H): 20.5 x 10.3 x 3 cm (approximately). Quantity: 1 unit (270 units). Size type: 18 sizes (as shown in the picture). p> 20 pieces (diameter) 5.29 x (thickness) 1.78 mm. 20 pieces (diameter) 6.07 x (thickness) 1.78 mm. 20 pieces (diameter) 6.8 x (thickness) 1.9 mm. 20 pieces (diameter) 7.68 x (thickness) 1.78 mm. 20 pieces (diameter) 7.8 x (thickness) 1.9 mm. 20 pieces (diameter) 8 x (thickness) 2 mm. 20 pieces (diameter) 8.8 x (thickness) 1.9 mm. 15 pieces (diameter) 10.82 x (thickness) 1.78 mm. 15 pieces (diameter) 10.77 x (thickness) 2.62 mm. 15 pieces (diameter) 11 x (thickness) 2 mm. 15 pieces (diameter) 12 x (thickness) 2 mm. 10 pieces (diameter) 13.9 x (thickness) 1.8 mm. 10 pieces (diameter) 13 .95 x (thickness) 2.62 mm. 10 pieces (diameter) 14 x (thickness) 2 mm. 10 pieces (diameter) 15 x (thickness) 2 mm. 10 pieces (diameter) 17 x (thickness) 2 mm. 10 pieces (diameter) 17.17 x (thickness) 1.78 mm.< /p> 10 pieces (diameter) 17.04 x (thickness) 3.53 mm.