Features: 1.Assortment O-Rings with convenient resealable plastic case 2.Total 18 most popular used O-ring Sizes 3.Hydrogenated Nitrile Butadiene Rubber (HNBR), also known as Highly Saturated Nitrile (HSN) is special class of nitrile rubber (NBR) and is for mission critical application 4.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 5.Professional manufacture ensures you higher quality products, you can buy it with ease. Specification: Description:_x000D_ _x000D_ Assortment O-Rings with convenient resealable plastic case. _x000D_ Total 18 most popular used O-ring Sizes. _x000D_ 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. _x000D_ 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. _x000D_ _x000D_ Specifications:_x000D_ Material: Rubber_x000D_ Housing color: Green_x000D_ Size types: 18 sizes (as picture show)_x000D_ Box size (L*W*H): 23x10x3cm/9.04"x3.93"x1.18"(approx)_x000D_ Quantity: 1 set (270 pieces)_x000D_ Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, Thank you._x000D_ _x000D_ Package include:_x000D_ 1 x Set Rubber O Ring PackageList: