Valve Insulation Heater, Cover Type Valve Jacket, For Fitting Type Tee, Wye, Facing Material Silicone, Insulation Material Mineral Wool, Maximum Ambient Temperature 200 Degrees F, Cover Width 12 in, Cover Length 18 in, Thickness 3 in, Color Gray, Fastening System Lacing Anchor and Wire, For Minimum Circumference 7 in, For Maximum Circumference 13 in, R Value 0.48, Operating Voltage 120V