The Elinchrom EL 24019 Flashtube is a newer model of flashtubes that are easy-to-replace and long-lasting used with EL 20161 R2000 Heads and EL 20159 Mini R Heads.In the previous models of the flash head, you have to remove many screws in the head and socket base, but in this newer version you just have to plug the flash tube in the socketUnder normal conditions, this Elinchrom EL 24019 Flashtube can produce up to ten thousand flashes when handled properly