Pipe Fitting Insulation, Insulation Material Cellular Glass, Installation Style Slit in Half, Inside Diameter 3 in, Wall Thickness 1 in, Form 90 Degrees Elbow, Minimum Operating Temperature -450 Degrees F, Maximum Operating Temperature 900 Degrees F, R Value 3.5, Color Black, For Pipe Size 2 1/2 in, Flame Spread Index 25, Foam Cell Type Closed, Plenum Rating Plenum Rated, Flexibility Rigid, For Tube Outside Diameter 3 in
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