Electron tube 6S45P-E (6C45П-E) is a rugged triode with very high mutual conductance, designed for usage in wideband amplification. Electron tube has gold plated grid. Long life tube (at least 5000 hours). Tube is similar to the WE437, but it is not a direct replacement. Electron tubes are new and in original boxes. Datasheet is included. Made by Reflektor, Saratov in the 80's.