Strong™ Adapter Plates for Converting 200mm x 200mm up to 400mm x 400mm VESA Pattern (Black): The great thing with standards is that there are so many to choose from... In order to meet the never-consistent VESA mounting patterns of displays, the Strong™ SM-ADP-M-400X400 adapter plates give you greater flexibility beyond the the mount's standard 200X200 pattern.
TV Pattern Flexibility: Attach these adapter plates on the left and right of the mount head or to the top and bottom. This offers 8 more VESA patterns to support a variety of TV patterns from 200x200 up to 400x400. See below for additional patterns.
Quick Install: Attached studs on the back of the adapter plates easily align with the existing 200x200 pattern on the mount head. Just secure it with the supplied Nylock nuts, and you're done.