Buy It Now Price is for 50 pcs620 ohm ( 1/4 W ) + 5%Carbon Film Fixed Resistorsfor LEDs or Bulbs Characteristic Price is for 50 units620 ohm + 5%1/4 W + 5%Resistor's Lenth: 5 mm ( total lenth 56mm )Brand newPRODUCT DESCRIPTION you may connect this resistor with your 3V LEDs or Bulbs in series before you use them on 12V power source....