About this 3D model

I tend to buy my nozzles in batches, and I wanted a way to store them without having to read the dots and tiny embossed lettering off the side of them. This little tray holds up to 18 nozzles, in three rows, and the end is labelled 0.3, 0.4, and 0.5, which are the three sizes I use the most. The nozzle holes are 7.2mm wide, so if it's too tight, just scale up by 1-2%. The nozzles should fit snugly in the holes, and the underside is open, to allow you to pop them out easily.