Pipe Fitting Insulation Insulation Material Mineral Wool Installation Style Unslit Inside Diameter 3 in Wall Thickness 1 1/2 in Form 90 Degrees Elbow Minimum Operating Temperature 0 Degrees F Maximum Operating Temperature 1 200 Degrees F R Value 6.5 Color Green For Pipe Size 2 1/2 in Flame Spread Index 25 Foam Cell Type Open Plenum Rating Plenum Rated Flexibility Rigid For Tube Outside Diameter 3 in