Pipe Insulation, Insulation Material Polyethylene, Installation Style Semi-Slit, Inside Diameter 2 5/8 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 5.4, Form Tube, For Copper Tube Size 2 5/8 in, For Pipe Size 2 1/2 in, Flame Spread Index 25, Smoke Developed Index 50, Foam Cell Type Closed, Plenum Rating Plenum Rated, Flexibility Flexible