Steel Pipe & TubeChina 140kg/M3 Density 30mm 50mm 70mm Thickness Absorbing Steam Pipe Insulation Material Rock Wool Pipe, Rockwool Board/Blanket/Pipe/Tube140kg/M3 Density 30mm 50mm 70, Find details about China Rockwool, Rock Wool Pipe from 140kg/M3 Density 30mm 50mm 70mm Thickness Absorbing Steam Pipe Insulation Material Rock Wool Pipe, Rockwool Board/Blanket/Pipe/Tube140kg/M3 Density 30mm 50mm 70