Brand New --> 4 X 9 Pin to Octal Adapters retail USD 19.99 X 4 = 99.96 + tax and shipping from valvesnmore --> the distributor https://valvesnmore.com/product/9-pin-to-octal-adapter/ if you have any questions, they are prompt to reply Designed to adapt 9 pin dual triode tubes using the 9A, 9AJ, 9DE pin arrangements to an Octal base with 8B pin arrangements. Commonly adaptable tubes include: 12AU7 > 12SN7, 12AT7 > 12SL7 6CG7 > 6SN7, 6GU7 > 6SN7 also 6N1P, 6BZ7, 6DJ8, 6N6P, 6N23P