We supply metal SPIRAL DUCTWORK from 63 mm to 1600 mm diameter in galvanised metal steel. Other special duct materials and finishes are available, along with a full range of fittings and ancillary components. 

Note that our straight lengths of 3 metre metal spiral ducting tube are 'female' i.e. spiral ducting fittings such as bends and reducers are 'male' and generally slip inside the duct tube. To connect two 'male' duct ends together without straight spiral use a 'female' straightducting connector.