Light, Double Amber (12 v) (PAIR) - Fits Various: 

4" OD - 3/8" Diameter mounting stud - hole through the center - single wire  

rpls/references: 164177AS, W164177AS

NOTE: Just an FYI - You will need to snip the female slide connector off of the wire to be to get the nut of the light stud.  For some reason, the supplier crimps the connector on the wire ..... Oh, Well, It's a very nice light for the $$$$ - Thanks, Rick