Flip stops are normally spaced at 125" apart, but can be set at customer specified intervals.
The compression fittings are enclosed inside the main frame and fit through the bottom of the trailer, keeping all air lines under the trailer itself, not just under the floor which could create difficulties for air line maintenance.
All rollers are heavy gauge, not just those at the rear of the trailer.
The main floor and top plates complete the installation. Total weight capacity of the completed system is 520 lbs / ft.