Self-Seal Insulation, Insulation Material EPDM, Installation Style Slit with Adhesive and Flap, Inside Diameter 3/4 in, Wall Thickness 1 in, Overall Length 6 ft, Minimum Operating Temperature -297 Degrees F, Maximum Operating Temperature 257 Degrees F, Facing Material Unfaced, Color Black, R Value 7.4, Form Tube, For Copper Tube Size 7/8 in, For Pipe Size 1/2 in, Flame Spread Index 25, Smoke Developed Index 50, Foam Cell Type Closed, Plenum Rating Plenum Rated, Flexibility Flexible