uxcell 10pcs DC 3V 3500RPM Pager Cell Phone Micro Vibration Motor 4mm x 8mm Country of Manufacture: CHINA; Material: Electric Part Net Weight: 8g; Package Content: 10 x Vibration Motor Rated: DC 3V; Rotary Speed: 3500PRM Oscillator Size: 4 x 2mm/ 0.16 x 0.08inch(D*H) Body Size: 4 x 8mm/ 0.16 x 0.31inch(D*H)