50mm and 58mm outside diameter available, good quality, leaks-proof. More than 5-years in brass pump producing! Each pump are tested rigorouly under 8bar in house!Good advantage in price and quality for item: Fiberglass lance, Brass lance, nozzles/tips, PVC hose, Filter, Spring, Brass shut-off, Rod, level, metal base, shoulder strap, pumps,O-RING/Gasket and spray weight etc.Factory price!