For sale is a matched pair of the highly acclaimed Emission Labs 300B-XLS tubes. These are wonderful tubes if you have a need for this model. I don't think there is another brand made today that can touch them. These will last for many more hours, as I have used them, conservatively, for 400 hours.
They are currently in an Art Audio Diavolo amp that I have listed for sale separately, and I'll do a package deal for both. If you're in Denver you should come by and hear how great these sound.
Original box and manual are included. Free shipping to continental US if my full asking price is met. Otherwise shipping will be $20.