Pipe silencer made of galvanized sheet steel to reduce noise in round air ducts.
A polyester fleece between the inner tube and insulation prevents mineral wool fibers from entering the airflow.

Technical details:
-Absorption material consists of non-combustible mineral wool
-Outer jacket and inner perforated plate made of galvanized sheet steel
-Diameter of connection on both sides 355mm
-Sound pack 50mm
-Length without connections 90cm