Most current, professional flash heads and monolights are equipped with user replaceable flashtubes that may simply be plugged into, and unplugged from their sockets. With proper handling, these flashtubes may last for tens of thousands of flashes under normal use.
Wasn't sure I was going to find this but it shipped immediately well packed fit perfect and now my strobe works again.
It's a flashtube, big deal. But it's the only one that fits my Excalibur flash units, and B&H is pretty much the only place that stocks it. I don't like the price, but I love being able to buy it, plug it in and go on shooting. Thanks, B&H. (And next time don't drop the flash, dummy.)