Material:Alloy Color: as shown in pic Descrption: Hollow glass specification: 7x16 mm Rated Voltage : 3.7v Speed : 50000 RPM (the actual speed may be high or low) Electricity flow: no-load: 0.08A Locked rotor:1.8A Rated voltage :4.2 v Electricity flow : no-load 0.1A ,blocked :2A Speed : 50000RPM Output shaft :0.6mm Output shaft lenght :7mm Lead long :about 46mm