Pipe Fitting Insulation, Insulation Material Fiberglass, Installation Style Slit, Inside Diameter 1 1/2 in, Wall Thickness 1 1/2 in, Form Tee, Minimum Operating Temperature 0 Degrees F, Maximum Operating Temperature 450 Degrees F, R Value 7.5, Color White, For Pipe Size 1 in, Standards ASTM C372, ASTM C547, ASTM E84, Outside Diameter 4 1/2 in