Pipe Insulation Insulation Material EPDM Installation Style Unslit Inside Diameter 6 1/8 in Wall Thickness 1/2 in Overall Length 6 ft Minimum Operating Temperature -297 Degrees F Maximum Operating Temperature 300 Degrees F Jacket Material Unfaced Color Black R Value 2.04 Form Tube For Copper Tube Size 6 1/8 in Flame Spread Index 20 Smoke Developed Index 50 Foam Cell Type Closed Plenum Rating Plenum Rated Flexibility Flexible For Tube Outside Diameter 6 1/8 in