Stacking trays

A customer has asked these questions about our solid wood desk trays:

I already have a single letter sized desk tray but I need a doulbe tray do I have to order a double tray or can I order another single tray and some stacking supports? Are they difficult to assemble? Are there tools required for assembly?

All of our Hedberg style and Classic style trays can be stacked using the metal stacking supports. These supports slide into position to suspend a tray above your existing tray. The Harvard style and Cherry Ridge style trays do not function this way and are supplied with integral supports.