Shuguang 12AX7B Silver Dragon Matched Pair
Price is for a matched pair of 12AX7B Silver Doragon. These are higher gain version of 12AX7C9 with shiny silver anode. It has a bit more bite than C9 in guitar amps.
Shuguang 12AX7B is sometimes labeled as 12AX7, but it's the same tube. Please note that recent version of 12AX7B comes with grey coating on anode.