1) Dimension:a)51*20*15mm b)58*30*28mm c) 60*45*15mm d)75*38*25mm e)75*39.5*30mm f)94*56.5*33mm g) 120*60*32mm 2) Rated voltage: 5V/12V/24V 3) Type: ball bearing, sleeve bearing4)Safety Approvals:CE、TUV、UL、CUL、CCC