Material	Aluminum foil, 25mm thickness, made of fiberglass 16kg-24kg/m3
Features	The inner tube is made of reinforced aluminum foil and is filled with highly tensile spiral steel wires to support the tube.  Fiberglass with 25mm thickness 16kg-24kg/m3 is used for thermal isulation.  The product applies on efficient silencer system when there is a high temperature variation.  It can absorb 10% -25% tube noise.  This product has passed the fire resistant test.

Size	Standard length	Maximum air velocity	Temperature range	Maximum pressure resistant rate
3"-60"	10M	28M/S	-20℃～120℃	100mmWG