The Freijo quatro is a very sturdy, very long (1400 mm), and very well designed steel shelf for use with the Black Panther System keyboard stands. It has a small lip in front to help keep things in place, and secures to the tier with easy to attach hand bolts. This is something that was desperately needed- a place to put desktop synths, drum machines, MIDI controllers, even your laptop. Something so well designed, yet simple. As of mid 2021 I am not aware of any other manufacturer who makes anything like it. Bravo, BPS!