Pipe Insulation Insulation Material Polyethylene Installation Style Slit with Adhesive Inside Diameter 1/2 in Wall Thickness 3/8 in Overall Length 6 ft Minimum Operating Temperature -160 Degrees F Maximum Operating Temperature 200 Degrees F Facing Material Unfaced Color Black R Value 2.3 Form Tube For Copper Tube Size 1/2 in For Pipe Size 1/8 in Flame Spread Index 25 Smoke Developed Index 50 Foam Cell Type Closed Plenum Rating Plenum Rated Flexibility Flexible