This is the extra cost for
4 extra NOS BRIMAR 6060T (aka 12AT7WA) instead of ECC81 TAD premium
1 extra NOS BRIMAR 6060T (aka 12AT7WA) for safety reason in case one break (due to rarety of that tube)
The shipping cost is free as the additional weight is very light.
> THIS PACK CAN BE SOLD ONLY WITH A DOGE 8. WE DON’T SELL BRIMAR SEPARATELY, EVEN FOR CUSTOMERS WHO ALREADY BOUGHT A DOGE 8 IN THE PAST. WE DON’T HAVE ENOUGH
> IT IS LIMITED TO ONE UNIT PER CUSTOMER