Valve Insulation Cover Type Insulation Jacket For Fitting Type Strainers Tee Valve Wye Jacket Material Silicone Coated Fiberglass Cloth Insulation Material Fiberglass Mineral Wool Maximum Ambient Temperature 900 Degrees F Cover Width 12 in Cover Length 36 in Thickness 3 in Color Gray Fastening System Hook and Wire For Minimum Circumference 25 in For Maximum Circumference 31 in R Value 0.48 For Valve Type Universal Standards OSHA Market Industrial Reusable Yes