Pipe Insulation Insulation Material Polyethylene Installation Style Slit with Adhesive Inside Diameter 2 1/8 in Wall Thickness 1 in Overall Length 6 ft Minimum Operating Temperature -160 Degrees F Maximum Operating Temperature 200 Degrees F Facing Material Unfaced Color Black R Value 5.5 Form Tube For Copper Tube Size 2 1/8 in For Pipe Size Not Applicable Flame Spread Index 25 Smoke Developed Index 50 Foam Cell Type Closed Plenum Rating Plenum Rated Flexibility Flexible