MATERIAL: The cigarette lighter socket made of corrosion resistant materials to ensure solid contact and low voltage drop. It has watertight cap to keep aways from the water and dust. MINI SIZE: Electronic cigarette lighter size is 2.56 in x 1.18 in. You can insert it to a hole which diameter is 1.22 inch . It is convenient that the central electrode can be twisted. EASY TO INSTALL: This 12v cigarette lighter outlet is easy to use, just need to snaps the cigarette lighter socket in the hole, it will work anywhere you can mount it and run the leads to the 12v power supply. WIDELY USE: The car auxiliary socket power outlet fits for all 12V accessory plugs, apply to any DC, 12V motorcycles, boats, mowers, tractors, cars, etc. Work perfectly with any car powered devices.