Features: 1.2. Rock wool tube (1) Weight:100-180kg/m3 (2) Inner Diameter:φ22mm-1220mm; (3) Thickness:30mm-200mm; 2.0 Performance 2.1. Good performance of thermal insulation, mechanical, fire prevention 2.2. High acidity has better chemical stability and fiber durability. 2.3. Low cost and high temperature resistance. 2.4. Good characteristics of sound absorption