Feature: Condition: 100% Brand New high quality 270 Pcs Air Conditioning O Ring Assortment Kit Green Assortment O-Rings with convenient resealable plastic case Total 18 most popular used O-ring Sizes 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 Material: Rubber Housing color: Green Size types: 18 sizes (as picture show) 1/8 x 1/4 20pcs 5/32 x 9/32 20pcs 3/16 x 5/16 20pcs 7/32 x 11/32 20pcs 1/4 x 3/8 20 pcs 5/16 x 7/16 20pcs 3/8 x 1/2 15pcs 1/2 x 5/8 15pcs 5/8 x 3/4 15pcs 3/8 x 9/16 15pcs 7/16 x 5/8 15pcs 1/2 x 11/16 15pcs 9/16 x 3/4 10pcs 5/8 x 13/16 10pcs 11/16 x 7/8 10pcs 3/1 x 15/16 10pcs 3/4 x 1 10pcs 13/16 x 17/16 10pcs Fast Shipping from Sydney! Package: 1et of 270Pcs 18 Sizes O-ring Kit