6156 (equivalent to C1112 / QY4-250 / RS686 / CV2131, same as 4-250A / 5D22 but without base ring) output tubes. They are all new in the original packaging and show no signs of ever being used. Various brands. The price is PER TUBE. Limited quantities available. This item is shipped from Britain, in North America or Asia please allow 2 to 3 weeks for delivery.
Here is the spec sheet for this part: http://www.mif.pg.gda.pl/homepages/frank/sheets/118/r/RS686.pdf