SPEEDLOCK

ducting for dust and fume extraction, ventilation and pneumatic conveying, composed wholly or principally of metal, and tubes for dust and fume extraction, ventilation and pneumatic conveying, composed wholly or principally of metal; and components and accessories for the foregoing, composed wholly or principally of metal, namely, flanges, bends, branches, "Y"-pieces, square to round transition pieces, telescopic sections, locking rings, dampers, cones, support brackets, floor sweeps, duct silencers, diverter valves and rotary valves