Insulated Pipe Jacket Cover Type Insulation Jacket For Fitting Type Straight Pipe Sections Jacket Material Silicone Coated Fiberglass Cloth Insulation Material Fiberglass Mineral Wool Maximum Ambient Temperature 900 Degrees F Cover Width 18 in Cover Length 30 in Thickness 3 in Color Gray Fastening System Quick Release Fabric Flap and Wiretwists For Minimum Circumference 19 in For Maximum Circumference 25 in R Value 0.48 For Valve Type Universal Standards OSHA Market Industrial