| Inside diameter | 52-406mm |
| Anechoic performance | 10～20 A(dB)/m |
| Working pressure limit | 2500Pa |
| Perforation rate | >15% |
| Production length | 10m |
| sound-absorbing cotton | 25~50mm |
| inlay | Micro Perforated Aluminum Foil |
| Construction | Jacket-PVC composite aluminum foil single tube |
| Application | Air conditioning system, fresh air system, VAV sy stem, all-air system, etc, Return air duct end muf fling |
| Characteristics | Significant noise reduction effect in medium and high frequency, inner tube working temperature -30to+110℃ |
