Feature: 1, carbon fiber sleeve 2, pure brass motor 3, ceramics shaft 4, low noise and long life 5, small size with super function 6, brushless, no pollution, magnetic isolated and 100% water proof 7, low working voltage, more safe Sl-dc(small) series specification: Model sl-dc2l1000y04-s Rated voltage(v) 24 Rated power(w) 24 Max static lift(m) 4 Max flow(l/h) 1000 Od(mm) 13 Net weight(kg) 0.34 Noise(db) 30000