The setup includes:
 
(2) Model 616 Round Halogen Lamps
(2) Steel seat brackets
(2) Standard mounting bail brackets
(1) Steel cross mount with (2) nuts and bolts
 
Lamps measure 5-5/8"
 
Available in any color combo of your choice.
Any color choice with blue, adds $10 per blue lamp to the cost. 
 
All components are new old stock
 
This kit will work with a variety of vehicles. This mounts directly to the existing seat bolts on your vehicle.
This setup was widely used in California in the 70s, 80s, & 90s mounted in the rear deck on the driverside. Many other California agencies also used this setup in a variety of color combos.
 
Requires a flasher to alternate flash if desired.
 
Add an alternating flasher for an additional $15 to flash these lights back and forth.