Pipe Insulation, Insulation Material Fiberglass, Installation Style Slit with Adhesive and Flap, Inside Diameter 2 29/32 in, Wall Thickness 1 1/2 in, Overall Length 3 ft, Minimum Operating Temperature 0 Degrees F, Maximum Operating Temperature 1,000 Degrees F, Facing Material ASJ Facing, Color Tan, R Value 11.8, Form Tube, For Pipe Size 2 1/2 in, Flame Spread Index 25, Smoke Developed Index 50, Foam Cell Type Not Applicable, Plenum Rating Plenum Rated, Flexibility Not Applicable