Buna-N Roll, Material Buna-N, Shape Roll, Grade Flame-Resistant, Length 72 in, Width 40 in, Thickness 1/4 in, Backing Type Plain, Cell Type Closed Cell, Adhesive Type Plain Backing, Number of Adhesive Sides 0, Color Black, Density 8 lb/cu ft, Maximum Temperature 160 Degrees F, Minimum Temperature -20 Degrees F, Tensile Strength 70 psi, Texture Smooth, Firmness @ 25 Percent Deflection 3.5 psi, Material Skin None, Standards ASTM D1056/2B1/SBE41/II, Chemical Resistance Good, Oil Resistance Good