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 1 in Fits Tube Size 1 3/8 in Insulation Nominal I.D. 1 3/8 in Insulation Temp Range -70 Degrees F to 220 Degrees F Insulation Approx R Value 3.2 Insulation Approx K Value 0.23 Color Black