Description:- 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 Specifications:Material: RubberColor: greenApplication: Silicone rubber, nitrile rubber, fluorine rubber air conditioning seal ring Type size: 18 sizes (as shown in the picture)20pcs - (Diameter)5.29*(Thickness)1.78mm20pcs - (Diameter)6.07*(Thickness)1.78mm20pcs - (Diameter)6.8*(Thickness)1.9mm20pcs - (Diameter)7.68*(Thickness)1.78mm20pcs - (Diameter)7.8*(Thickness)1.9mm20pcs - (Diameter)8*(Thickness)2mm20pcs - (Diameter)8.8*(Thickness)1.9mm15pcs - (Diameter)10.82*(Thickness)1.78mm15pcs - (Diameter)10.77*(Thickness)2.62mm15pcs - (Diameter)11*(Thickness)2mm15pcs - (Diameter)12*(Thickness)2mm10pcs - (Diameter)13.9* (Thickness)1.8mm10pcs - (Diameter)13.95* (Thickness)2.62mm10pcs - (Diameter)14*(Thickness)2mm10pcs - (Diameter)15*(Thickness)2mm10pcs - (Diameter)17*(Thickness)2mm10pcs - (Diameter)17.17*(Thickness)1.78mm10pcs - (Diameter)17.04*(Thickness)3.53mm Package Includes:1 X 270Pcs 18 Sizes O-ring Kit