Shipping torsion bars

Go to your local carpet store and ask for a cardboard tube that comes in the center of a carpet roll. They will undoubtably give you one, or 3 for free. I get them all the time to ship trim in, they’re heavy sided and work great. I wrap stuff in old swimming pool solar covers, aka industrial bubble wrap, then make a plug out of 2” styrofoam and jam it in the end, then shipping tape the ends both over the top and down the sides, then around the edge. Haven’t lost an item out of one yet, and have shipped many pairs of torsion bars that way.