Pipe Insulation Insulation Material Buna-N Rubber/PVC Installation Style Slit with Adhesive and Flap Inside Diameter 3/4 in Wall Thickness 1/2 in Overall Length 6 ft Minimum Operating Temperature -70 Degrees F Maximum Operating Temperature 220 Degrees F Facing Material Unfaced Color Black R Value 3.1 Form Tube For Copper Tube Size 3/4 in For Pipe Size Not Applicable Flame Spread Index 94 Smoke Developed Index 119 Foam Cell Type Closed Plenum Rating Plenum Rated