Overview The Air Connections SONOCONNECT ducting is built with Rockwool to dampen noises. The 25mm insulation is an acoustic barrier and the exterior jacket act as a vapour barrier. The exterior jacket is made of multi-layer aluminium, which offers increased strength and flexibility. The product is available in 5 lengths, and 3 diameter sizes. General Information The product comprises 25mm Rockwool insulation, which acts as an acoustic barrier; The exterior jacket is made of multi-layer aluminium; The insulated product is available in 3 diameter sizes - 200mm, 250mm, and 315mm; The insulated ducting is available in 10m lengths. Benefits It's strong and flexible; It's resistant and durable; It's made at the highest standards of quality and performance.