O-Ring Assortment, SAE, Material Buna N and Viton(R), Number of Pieces 610, Number of Sizes 24, Durometer 70 Shore A, Hardness Medium Hard, Sizes Included AS568A Dash No. Buna N (40) Each of 012, 013, 110, 112, 113, (30) Each of 007, 014, 016, 115, 214, (25) Each of 010, 011, 111, 116, 210, 211, (20) Each of 120, 212, 216, (10) Each of 218, 220, 222, 326, Viton (10) 120, Case Type Plastic Box, Meets/Exceeds ASTM D2000, Temp. Range -40 Degrees to 250 Degrees F, Color Black