Rockwool pipe cover Availability: Inside Diameter: 18 ~ 850mm; Thickness: 25 ~ 300mm; Length: 1000mm Density: 100 ~ 150kg/m3 Thermal Conductivity (typical figure) Mean Temp (C): 50, 100, 150, 200, 250, 300, 350, 400 K-value (W/mK) 0.04, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.10 Pipe covers are no-combustible, and high water-repellent performance, non-hygroscopic. Rockwool is neutral (PH 7) or slightly alkaline. It will not normally support the growth of molds, fungi and bacteria.