Pipe Insulation Insulation Body Material NBR/PVC Type - Pipe Insulation Pre-Slit/Pre-Glued with Overflap Wall Thickness - Insulation 1/2 In. Insulation Length 6 ft. Fits Pipe Size - Pipe Insulation 3 In. Fits Tube Size 3-1/2 In. Insulation Nominal I.D. 3-1/2 In. Insulation Temp Range -70 Degrees to 220 Degrees F Insulation Approx R Value 3.20 Insulation Approx K Value 0.23 Color Black