Pipe Fitting Insulation, Insulation Material Mineral Wool, Installation Style Unslit, Inside Diameter 6 5/8 in, Wall Thickness 1 in, Form 90 Degrees Elbow, Minimum Operating Temperature 0 Degrees F, Maximum Operating Temperature 1,200 Degrees F, R Value 4.4, Color Green, For Pipe Size 6 in, Flame Spread Index 25, Foam Cell Type Open, Plenum Rating Plenum Rated, Flexibility Rigid, For Tube Outside Diameter 6 5/8 in