Dattatray enterprises manufactures drip-lub, marketed by polymel auto controls. Drip-lub is an automatic lubrication system made for correct oiling of machinery without persistent operator attention. It includes a lubrication unit, metering cartridges, and a control unit. The lubrication unit comes in standard tank capacities of 3 and 5 litres. The company also supplies it in non-standard capacities of 10, 15, 20, and 25, litres. Metering cartridges come in dose type and fixed amount type; the latter can be used for continuous or interrupted lubrication.