The Numatic vacuum attachment kit has been designed for use with the Axminster 63mm Dust Extraction Kit. It allows any Numatic vacuum machine from a "Henry" upwards to be used to provide the vacuum to this 63mm system. It simply fits into a DEK "T" junction and provides a threaded connector for the 2.5m double threaded Numatic hose which is part of the kit. This hose has the 51mm female thread allowing it to be fitted to any standard Numatic vacuum machine. For the purpose that the Axminster DEK is intended, even a Henry would provide adequate air flow and, when used with HepaFlo bags, top grade filtration as well. Simple to fit and very effective.