ARO Drum Pump Dispense Package – 14.4 GPM (54.5 LPM) Non Metallic, 12 GPM (45.4 LPM) Metallic. Complete dispense drum pump will move chemical from any 55-gallon drum to its finishing application location! ARO Drum Pumps are available in Aluminum, Stainless Steel or Polypropylene body materials. Stall-Free Operation - ARO Diaphragm Drum Pumps feature a patented 'Unbalanced' air valve design that avoids stall-out, even under low air-inlet pressures. Bolted Construction - Unlike traditional band-clamp style pumps, ARO Diaphragm Drum Pumps utilize bolted fasteners for leak-tight integrity. Factory-Matched - ARO Drum Pump Package components (adapters, siphon tubes, etc.) contain pre-specified, matching materials of construction for complete fluid compatibility. Pump Casing Materials: Aluminum, Polypropylene & Stainless Steel. Diaphragm Materials: Santoprene & Medical grade Santoprene. Diaphragm Materials: PTFE w/ Santoprene backer, Hytrel, Polyurethane & Santoprene. Complete Dispensing Package: Basic Pump, Foot Valve, Hose & Dispensing Nozzle