Pipe Insulation, Insulation Material Melamine, Installation Style Hinged with Self-Sealing Flap, Inside Diameter 2 3/8 in, Wall Thickness 1 in, Overall Length 4 ft, Minimum Operating Temperature -40 Degrees F, Maximum Operating Temperature 350 Degrees F, Facing Material ASJ Facing, Color White, R Value 5.12, Form Tube, For Pipe Size 2 in, Flame Spread Index 25, Smoke Developed Index 50, Foam Cell Type Open, Plenum Rating Plenum Rated, Flexibility Flexible. This item has been restricted from sale in the following state (s): []