Our cavity tubing is a folded spiral-seam tube with a right-handed spiral and reinforcement beading of approximately 3mm.  They are made from coiled banding 0.2mm to 0.4mm thick but other thicknesses are available on request.

Our cavity tubes are watertight, rugged and the flexible version can be bent into virtually any angle.  Available in a range of diameters from 40mm to 150mm