Pipe Insulation, Insulation Material Polyethylene, Installation Style Slit with Adhesive, Inside Diameter 4 1/8 in, Wall Thickness 3/4 in, Overall Length 6 ft, Minimum Operating Temperature -160 Degrees F, Maximum Operating Temperature 200 Degrees F, Facing Material Unfaced, Color Black, R Value 3.5, Form Tube, For Copper Tube Size 4 1/8 in, For Pipe Size 3 1/2 in, Flame Spread Index 25, Smoke Developed Index 50, Foam Cell Type Closed, Plenum Rating Plenum Rated, Flexibility Flexible Help prevent heat gain and condensation or frost formation on water and air conditioning lines with this durable TUNDRA pipe insulation. Preslit, self-sealing tubing has a factory applied adhesive and built-in release tabs to help speed installation. Insulation can be pushed around P-traps and elbows up to and including 1" copper tube size.