Yes they do. I haven't used UPS much these days but have used the Local P.O. because it's close. I sent a pair of 461's to Maine about ten years ago, one made it there the other didn't. A few weeks later I got a call from the guy in Maine and he told me he got the other head. The box was all torn up at the end, the heads were complete when I sent them but that one head had 2 springs, retainers and keepers in a separate bag and the head looked like it was mangled in some sort of machine, probably a sorting machine. He put it all back together and nothing was wrong, but it was a tense situation.