You are buying ONE retract not a set!!!!

Features Auto Cut Off and pre-installed 5mm Oleo Mounting Pin...It also comes with a

5mm x 150mm pin

Servoless retract with metal trunion with 44mm X 41mm mount (1) piece 90 degree

Please note the Operating Voltage and do not exceed otherwise they will burn out!!

The 5mm pin is removable via the set screws on both sides
 
Specs:
Operating Voltage: 4.5~6.0V
Supported Model Weight: up to 5kg(11lbs)
Mount Plate Dimensions: 44mm x 41mm
Screw Hole Spacing: 36mm x 33mm
Depth: 28mm
Length: 74mm
Pin: 5mm
Weight: 72g

Each retract has been cycled several times to insure that it works!!

Fast USA shipping