I use two of the tubes for transporting 4 Røde M5 microphones (each matched pair in one tube) and a Røde VideoMic NTG in the third tube, when the NTG is not packed “fully mounted” with camera shock mount and dead cat in a standard kitchenware spaghetti-box (also holding cables etc.). Same applies to one ‘bare-bones’ Sennheiser MKE 600, that will otherwise just fit into a normal Spagetti-box with mounted dead cat, cables and the tiny, but effective mount.
Real problem: ONLY three foam inserts are included (per tube) NOT four. The latter would be better, since the foam inserts easily end up “anywhere else”, than where expected (a slight gust of wind is all it takes).
Tip: If not in use, place foam inserts in wide part of a set. Far easier to get out ;-)