220 L (55 gallon) Drum Pump, 81 cm (32") length, threads into 5 cm (2") standard V threaded bung. Fits through minimum opening of 51 mm (2"). The Poly-Hand pump attaches directly to a standard drum bung or carboy. It is constructed entirely of rugged polyethylene and is inert to strong acids, alkalis and many solvents. Sizes are available to fit 30- and 55-gal plastic or steel drums and 20-L (5-gal) carboy (BA-107950000). The pump delivers by positive pressure on the downstroke of the piston and does not pressurize the vessel. Its ergonomic loop handle fits a gloved hand. The pump will deliver against a 3.65-m (12-ft) head of water and empty a drum or carboy to within 3 mm (1/8") of the bottom.