Used in situations where thermal insulation is required
- s=0.426/50 (mm), rock wool bulk density 80kg/cubic meter; length: 7500mm, add 1 steel belt.
- s=0.426/50 (mm), rock wool bulk density 80kg/cubic meter; length: 5500mm, add 1 steel belt.
- s=0.426/50 (mm), rock wool bulk density 80kg/cubic meter; length: 6200mm, add 1 steel belt.