Pipe Insulation, Insulation Material Buna-N Rubber/PVC, Installation Style Slit with Adhesive and Flap, Inside Diameter 1 5/8 in, Wall Thickness 3/4 in, Overall Length 6 ft, Minimum Operating Temperature -70 Degrees F, Maximum Operating Temperature 220 Degrees F, Facing Material Unfaced, Color Black, R Value 5.1, Form Tube, For Copper Tube Size 1 5/8 in, For Pipe Size 1 1/4 in, Flame Spread Index 111, Smoke Developed Index 136, Foam Cell Type Closed, Plenum Rating Plenum Rated