Industrial Dry Vacs - NVQ570-22 These were the first models designed and manufactured completely in Structofoam and they have proven themselves to be the complete answer to engineering integrity. Structofoam is our unique material specification that has superb strength and impact resistance allowing machines to be truly rugged yet without a weight penalty. Power and performance are to the full Twinflo' standard with a choice of one or twomotored specifications. All models are equipped with dual 2-stage primary filter systems as standard, to which can be added giant Hepaflo dust bags if required. The rugged Structofoam container is mounted on 4 x 75mm (3") non-marking, heavyduty castors and the compact size makes it ideal for numerous trades where it must frequently be moved from place to place such as builders, shop fitters, contractors etc. The accessory kit is full 38mm (11/2") with stainless steel tube sets and even the 400mm (16") floor nozzle is a Structofoam design.