Pipe Insulation, Insulation Material Mineral Wool, Installation Style Slit, Inside Diameter 1 5/8 in, Wall Thickness 1 1/2 in, Overall Length 3 ft, Minimum Operating Temperature 0 Degrees F, Maximum Operating Temperature 1,200 Degrees F, Facing Material Unfaced, Color Tan, R Value 6.52, Form Tube, For Copper Tube Size 1 5/8 in, For Pipe Size 1 1/4 in, Flame Spread Index 25, Foam Cell Type Open, Plenum Rating Plenum Rated, Flexibility Rigid, For Tube Outside Diameter 1 5/8 in