Pipe Fitting Insulation, Insulation Material Buna-N Rubber/PVC, Installation Style Unslit, Inside Diameter 7/8 in, Wall Thickness 1/2 in, Form 90 Degrees Elbow, Minimum Operating Temperature -297 Degrees F, Maximum Operating Temperature 220 Degrees F, R Value 3.1, Color Black, For Pipe Size 1/2 in, Flame Spread Index 25, Foam Cell Type Closed, Plenum Rating Plenum Rated, Flexibility Flexible, For Tube Outside Diameter 7/8 in, Resistance Properties , Flame/Fire Retardant