The R|Z568M is a modern hand-made nixie tube manufactured by Dalibor Farny. The tube is a reconstruction of the giant 50mm Z568M from RFT/WF. These tube handmade by Dalibor Farny and can be ordered. The tube is very beautiful and a fantastic piece of work. The tube it self has a stable aluminium base and a hand-soldered pcb as socket. I personally really admire the beautiful and precise work here! Absolutely one of my most favorite tubes! A Version with copper grids and base can also be seen on Dalibor's page. For more information about this beautiful tube check out www.daliborfarny.com and http://www.daliborfarny.com/r-z568m-nixie-tube/