As part of the System X range the BT8380-BASE attaches directly to BT8380 Vertical Support Columns to create a secure foundation for freestanding or mobile screen mounting. The sturdy metal base is supplied with adjustable levelling feet for post-installation levelling, these feet can be removed and replaced with BT8380-CASTORS (4" Locking/Braked Castors) to create a mobile solution. Bases are supplied as individual units, one base must be used per column.