Price is for 1 complete4 heads Common Anode Railroad Crossing Signal( without circuit board falshers )HO or OO Scale they can be lightedCharacteristicPrice is for 1 complete signalSize for each : Approx. 50mm or 1.97" inch Heightfor HO or OO ScaleBrand newPRODUCT DESCRIPTION you may click the following photo to buy the flasher circuit board:you may control them manuallyor Control them automatically by moving train ( click the above photos )...