Pipe Fitting Insulation Insulation Material Fiberglass Installation Style Slit Inside Diameter 1 1/4 in Wall Thickness 2 in Form 90 Degrees Elbow Minimum Operating Temperature 0 Degrees F Maximum Operating Temperature 450 Degrees F R Value 10 Color White For Pipe Size 1 1/4 in Standards ASTM C325 ASTM C547 ASTM E84 Outside Diameter 5 1/4 in