Frame spacers stabilize selective frames when height to the top of the
top load is over 6 times the depth of the frame. Also eases
installation by predetermining frame separation distances in double row
selective setups. Use minimum two to 120" high, three to 216" high,
four to 312" high. Do not use as a frame-to-column tie. Order by
separation distance. Finish: Precaution Blue. Installation hardware is included.