Classic Cantabile NSA-20 Storage Box for Music Stands

It is exactly as described, but I would have liked it to be a little wider and deeper for storing glasses.

This tray is mounted on the music stand in no time. As delivered, it can be used to store small items during practice, rehearsals or on stage. Pens, wristwatch, a small (!) Digital Metronome or other small parts find space in it. Through the small notch on the right, you can also let longer pencils etc. protrude. You can also put a small digital tuner or metronome in horizontally. But:
I mention "small" things and there is already the main problem: At least for a drummer the dimensions are not well chosen: A serious metronome for live use doesn't fit in the tray because a few millimeters of depth are missing. And my cell phone (because of the metronome app) is also wobbly because the tray is two centimeters too narrow for it. Thus, the thing would be rather useless for me, but:
The attachment to the folding music stand is unbeatably fast and I decided to make something out of it. The holders don't cost a lot of money and with a minimum of effort you can make something useful out of it. For me it has become well-functioning metronome / cell phone holder.
Who does not want to tinker, I can recommend this product only in the event that it is really only a shelf for pencil, eraser and clock, Portemonaie keys, wallet or (not and) a small tuner or metronome.

Great storage box for this money for tuner and pencil. The edge must be glued with superglue, otherwise it is a little wobbly.

I use them as a glasses tray (change between glasses and everyday glasses).
This was always quite cumbersome and often took a lot of time. Now everything is quickly at hand.
Due to the clip-on function is also quickly "dismantled" again when the music stand is assembled.

I have kept the thing because the return effort is just too big for me. But whether it is worth the price, well, I dare to doubt very much. 1 EUR would perhaps be appropriate. The storage box comes in 3 parts (!), which simply do not want to fit together. You have to glue the part together somehow with glue, otherwise it doesn't even serve its purpose. And even if you glue it together, remain so large gaps at the edge that bspw. paper clips or the like would simply fall through. totally rickety and just ridiculous.