1.Thickness,heavy crank case and pump head 2.Good price,high quality 3.Connecting with engine or electric motor,for pesticid Model:RS-55Pistons*Diamete*Storke:3*25*20Rotate speed(R.P.M):1000-1200Sunction capacity(L/min):18-28Work pressure(Mpa):2.0-4.5Requie power(kw):1.5-2.2Dimension(mm):320L*280W*300HNet weight(kgs):9 RS-55 high pressure cheaning pump