Buna-N Sheet, Sheet, Adhesive Type Plain Backing, Backing Type Non-Adhesive, Color Black, Durometer 40A, Grade Standard, Material Buna-N, Standards ASTM D2000 BF 407, Maximum Temperature 250 Degrees F, Minimum Temperature -30 Degrees F, Overall Length 24 in, Thickness Tolerance +/-0.050 in, Overall Width 12 in, Tensile Strength 1,000 psi, Texture Smooth, Overall Thickness 0.5 in, Abrasion Resistance Good, Chemical Resistance Fair, Oil Resistance Excellent, Water Resistance Good