These high quality cab lights are exact replicas of the factory GM cab lights used from 1969 thru 1991 on Chevy and GMC trucks and Suburbans. The base on these have the bulb socket mounted above the rubber base instead of below the base like on 69-72 trucks. This allows you to use these on 67 to 72 trucks that didnt have tbem from the factory. This way you can easily mount and wire them on a non cab light truck, The super bright SMD LED bulbs draw much less amperage, are quicker on-off and will far outlast the factory T10 style bulbs. The amber covers are very high quality ABS plastic and wont fade or crack. This is the perfect addition to any 67 to 72 or 73 to 87 truck Blazer or Suburban. You will get 5 rubber bases with lamp holders, 5 amber lens covers and 5 super bright LED bulbs. Shipping is free to any of the lower 48 states.