Valve Insulation, Length 54 in, Valve Circumference Range 42 in to 49 in, Insulation Material Mineral Wool and Fiberglass, Jacket Material Silicone Coated Fiberglass Cloth, Fits Valve Type Universal, Thickness 3 in, Approx. R Value 0.48, Max. Temp. 900 Degrees F, Color Gray, Width 12 in