... pumping and draining in constrction building sites, tunnels ,culverts ,water reservoir also for wastewater discharging,industry,irrigation on farm landand ... gasoline engines.Diameter of connector max of pumpage max of pump ability length of hose GW3'' 12mtr 40m3/h 4-- ... (mm)Diameter of Flexible Shaft(mm)Length(M)Weight(kg)RB502"9003,000~3,4001830106M(4~7M)25RB803"120025321228 flexible shaft water pump