Pipe Insulation Insulation Material Buna-N Rubber/PVC Installation Style Slit with Adhesive and Flap Inside Diameter 7/8 in Wall Thickness 1 in Overall Length 6 ft Minimum Operating Temperature -70 Degrees F Maximum Operating Temperature 220 Degrees F Facing Material Unfaced Color Black R Value 7.2 Form Tube For Copper Tube Size 7/8 in For Pipe Size 1/2 in Flame Spread Index 89 Smoke Developed Index 114 Foam Cell Type Closed Plenum Rating Plenum Rated Flexibility Flexible