HNBR (Hydrogenated Nitrile Butadiene Rubber) is also commonly referred to as HSN (Highly Saturated Nitrile). This material has better oil and chemical resistance than standard nitrile rubbers and can also withstand much higher temperatures. Like nitrile, this type of elastomer has excellent resistance to oils and fuels but it also has excellent resistance to many chemicals, heat (steam/hot water) and ozone. The mechanical properties like tensile and tear strength, elongation and abrasion resistance are also excellent. Furthermore, HNBRs have good dynamic behavior at elevated temperatures. Disadvantages include higher cost and limited resistance to aromatic oils and polar organic solvents, poor electrical properties and poor flame resistance. Global O-Ring, Series: HNBR90, 2.237 in ID, 0.103 in Cross Section, 140 Dash Number, 90 Shore A Durometer, -40 to 302 °F, HNBR, Black