Propeller hard case
I designed this for my 250-quad props. Props up to 6in fits in the box that has outside dimensions of 170x55x50mm.
Two different lids are available, with or without the text "MULTI PROPS". I also made some sheets that can be glued inside the lid to give the effect of text in a different colour.
The lid is secured to the box using 8pcs of D5x2mm magnets.