Pipe Insulation, Insulation Material Buna-N Rubber/PVC, Installation Style Unslit, Inside Diameter 2 3/8 in, Wall Thickness 1/2 in, Overall Length 6 ft, Minimum Operating Temperature -297 Degrees F, Maximum Operating Temperature 220 Degrees F, Facing Material Unfaced, Color Black, R Value 2.7, Form Tube, For Pipe Size 2 in, Flame Spread Index 28, Smoke Developed Index 53, Foam Cell Type Closed, Plenum Rating Plenum Rated, Flexibility Flexible, For Tube Outside Diameter 2 3/8 in