There are currently 3 different SST's available to customers:
First SST: Single-Sided Standing Unit
The Single-Sided Standing Unit has one display and is bolted to the floor.
Second SST: Double-Sided Standing Unit
The Double-Sided Standing Unit has two displays, one on each side, and is bolted to the floor.
Third SST: Wall Mounted Unit
The Wall Mounted Unit has one display and is bolted to the wall.