1.Thickness,heavy crank case and pump head 2.Good price ,high quality 3.Connecting with engine or electric motor ,use for farm power sprayer is use for agriculture or farm chemicals ,pesticide,cleaning,cooling ..... and so on , connecting with engine or electric motor by stretcher or frame....Power sprayer ,piston pump,plunger pump,agriculture sprayer ,pump,pumps,sprayer pump,garden sprayerLL- ...