Electron Tube 6L6WGC. Great as a replacement for guitar amplifiers which use any 6L6 type tube. Great value for money and sound great. When ordering more then one tube, they will be sent as a matched pair or quad. Specs: Heater Current 0.9A Heater Voltage 6.3V Voltage Output 400V Anode Power 23W Base Type Octal Pin Count 8 Dimensions 38.5 (Dia.) x 115mm Body Length 98mm Diameter 38.5mm Overall Length 115mm