The G4200 is a 10″ extension that can be used with the Angle Mount Safeway hardware mount gate. Please see the guide below to find out how many extensions you will need based on the width of your opening. There is overlap in the measurements to account for uneven surfaces.
Extension Placement Guide
42″ – 52.5″ :one G4200/G4201 extension of 10″
52″ – 63″ :two G4200/G4201 extension of 10″