Packed up some stuff that was sold, so the 300x300x700 high unit was slightly changed after packing to 450x450x900 in a cardboard box, cushioned with plenty of extra cardboard as padding, bubble wrap ball on all sides well taped together, extra cardboard padding top and bottom and then an outer box to cover it all. Might get there unscathed, but every side has a fragile sticker on it. Added around 5kg to the mass with all that.
Courier was supposed to collect between 2PM and 4PM, but of course never showed up at that time, and when I left nearly at 5PM still no show.
Company that made the equipment was UK based, went belly up around a year ago, so no longer really around to support them, but there are spares available still, or you just machine them out of appropriate materials. Has a mains filter in it, dating from 1988, but not made by Schaffner, instead a Bulgin one, made using separate toroids per line and non RIFA capacitors, so still perfect after all this time.