RV SEREIS WORM GEAR SPEED REDUCER FEATURE : Compares with other manufacturers, more hardness and stronger for worm & worm wheel and lower noise Available to combine with DC Motor, YY(YN) or IK(RK) Induction Motor, Y Series AC motor, NEMA and IEC ac motor. Reducer Size 025, 030, 050, 063, 075, 090, 110, 130 Wide Reduction Ratio 30 ~ 20000 Self locking, Fast Stop, IP55 Brake available