This pump adopts shielding set of stainless steel and keep water away from electrical machinery completely, without seal,thus completely solve pump leaking, adopted the ceramic bearing. It has long-working time, and has completely solved the noise problem in working. With automatic-controlling devices, it is easy for operation. Some parts of pump are made of stainess steel, which keep water much more sanitary. POWER(W) VOLTAGE(V) SPEED(R/MIN0 HEAD(M) CAPACITY(L/MIN) G.W.(KG) DIMENSION 50-100 220-240 1400-2860 3-7 12-22 18(6pcs/ctn) 39x35x34.5 We can make different frequencies and voltages.