THIS IS THE EXTENSIONS ONLY AND DOES NOT INCLUDE MIDDLE STAND, YOU CAN FIND COMPLETE KITS HERE:

https://us.sim-motion.com/products/black-aluminum-1200mm-simulator-single-monitor-stand

The Sim-Motion black anodized aluminum triple monitor stand extensions for up to 40". 

Suitable for most monitors when used with our Single Monitor Stand 

Includes:

80mm x 40mm aluminum frame
2 X VESA mounting plates
Fixing screws/nuts

Disclaimer: Sim-Motion does not take responsibility for damage caused while using this product in correctly. 

Vesa Mounting Holes

75mm X 75mm
100mm x 100mm
200mm x 100mm
200mm x 200mm
300mm x 300mm
400mm x 200mm
400mm x 400mm

Comes with additional mounting hardware