Desk, VariDesk Pro Plus 48" Standing

VariDesk Pro Plus 48" , which is an adjustable height standing desk converter. 
It transforms any existing desk into a sit-stand workstation, accommodating dual monitors on its upper tier and a keyboard/mouse on the lower tray. 
It features a spring-assisted lift mechanism and dual handles for smooth and safe height adjustments between sitting and standing positions. 
The Pro Plus 48 is designed with a heavy weighted base and dual stability bars for stability at any height. 
It comes fully assembled, requiring no tools for setup; simply place it on your current desk.
Going condition used 
Spring works good