Self-Seal Insulation Insulation Material EPDM Installation Style Slit with Adhesive and Flap Inside Diameter 5/8 in Wall Thickness 1 in Overall Length 6 ft Minimum Operating Temperature -297 Degrees F Maximum Operating Temperature 257 Degrees F Jacket Material Unfaced Color Black R Value 7.7 Form Tube For Copper Tube Size 3/4 in Flame Spread Index 25 Smoke Developed Index 50 Foam Cell Type Closed Plenum Rating Plenum Rated Flexibility Flexible For Tube Outside Diameter 3/4 in