O-Ring Assortment, SAE, Material Buna N, Number of Pieces 70, Number of Sizes 7, Durometer 90 Shore A, Hardness Very Hard, Sizes Included AS568A Dash No. (10) Each of 210, 214, 219, 222, 225, 228, 232, Case Type Plastic Box with Lid Chart, Meets/Exceeds ASTM D2000, SAE J200, Temp. Range -25 Degrees to 250 Degrees F, Color Black