| Catalogue No | Description | Size | Finish |
| KSD40/20 |
Attenuator, Rectangular Duct
| 400x200mm | Steel Galvanised |
| KSD50/25-30 |
Attenuator, Rectangular Duct
| 500x300mm | Steel Galvanised |
| KSD60/30-35 |
Attenuator, Rectangular Duct
| 600x350mm | Steel Galvanised |
| KSD70/40 |
Attenuator, Rectangular Duct
| 700x400mm | Steel Galvanised |
| KSD80/50 |
Attenuator, Rectangular Duct
| 800x500mm | Steel Galvanised |
| KSD100/50 |
Attenuator, Rectangular Duct
| 1000x500mm | Steel Galvanised |
| SRSD100/600 |
Attenuator, Circular Spigoted
| 202x600mm | Galvanised Steel |
| SRSD125/600 |
Attenuator, Circular Spigoted
| 227x600mm | Galvanised Steel |
| SRSD150/600 |
Attenuator, Circular Spigoted
| 252x600mm | Galvanised Steel |
| SRSD160/600 |
Attenuator, Circular Spigoted
| 262x300mm | Galvanised Steel |
| SRSD200/600 |
Attenuator, Circular Spigoted
| 302x600mm | Galvanised Steel |
| SRSD250/600 |
Attenuator, Circular Spigoted
| 327x600mm | Galvanised Steel |
| SRSD315/600 |
Attenuator, Circular Spigoted
| 417x600mm | Galvanised Steel |
| SRSD355/600 |
Attenuator, Circular Spigoted
| 355x692mm | Galvanised Steel |
| SRSD400/600 |
Attenuator, Circular Spigoted
| 502x600mm | Galvanised Steel |
| SRSD400/900 |
Attenuator, Circular Spigoted
| 502x900mm | Galvanised Steel |
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