Lever pump based on the vacuum principle. The cartridge is screwed into position at the pump head, which allows a vacuum to form when the pumps starts to be used. The pump has a back panel with a simple spring that can be used to help facilitate the feed, primarily if it is cold and if you want to lubricate at a faster pace than is possible if the back panel is not used. The pump emits approx. 0.8 cm3/stroke (approx. 0.7 gram) at 400 bar counterpressure. The lever pump can be operated with one or two hands. This pump can only be used together with LS screw cartridges. Connection thread in pump int. R1/8". With 450 mm hose and 4-jaw nozzle.