O-Ring Assortment, SAE, Material Buna N, Number of Pieces 382, Number of Sizes 30, Durometer 70 Shore A, Hardness Medium Hard, Sizes Included AS568A Dash No. (20) Each of 006 to 012, (13) Each of 110 to 116, (10) Each of 210 to 222, (7) Each of 325 to 327, Case Type Plastic Box with Lid Chart, Meets/Exceeds ASTM D2000, SAE J200, Temp. Range -40 Degrees to 250 Degrees F, Color Black