This is for a NOS RCA 6GB5 EL500 by Mullard power tube that is in excellent clean condition in its original box and tested 108, minimum good is 70 and max is 130. This a made in GREAT BRITAIN tube by Mullard branded RCA with code X+1 over B0A3. See the pictures for condition, testing and all that is included. 

Check out my other items, Vintage Tubes, guitar parts and More!! I will combine items at a lower cost for shipping on multiple auctions won. second tube won usually ships free. Shipping is done by USPS. Ebay automatically adds state sales tax. For multiple items click REQUEST TOTAL FROM SELLER after Buy it Now to receive an invoice. No returns or refunds on overseas sales for any reason..