You are looking at three very good, matched NOS GE 6BL7GTA twin triode tubes with dark grey plates and halo getter holders. These tubes are in excellent condition.

These USA manufactured tubes in measure as new or better on our AVO 163 Tube 1 - 40.0/41.0. Tube 2 - 44.0/40.0.  Tube 3 - 40.0/43.0. They are very well matched. New measure for the 6BL7 on our AVO 163 Mk IV is 40.0, they are guaranteed not DOA. 

Please read the details below on shipping

All tubes are guaranteed not DOA. Shipping is by Australia Post and charged according to their rates for different zones around the globe. If you wish to check out the zoning and charges please visit auspost.com.au. The minimum shipping weight is 500gm, I pack tubes very well and I have only ever had one problem with damaged tubes in over 10,000 sales. There is a very small handling charge to cover packaging and handling. I do not profit from shipping and I wish I could charge less. I am a registered business and pay all the appropriate Australian taxes including 10% GST. 

Domestic shipping for this item is $10. Overseas shipping costs depend on which Australia Post destination zone your country is in. The charge stated in the invoice will be for world-wide where shipping with tracking which is $28. Some destinations are more expensive so please Email me for a shipping quote. If you live in a cheaper zone I will refund the difference ASAP on payment. Please Email me to know the specific shipping cost to your country.

Please Email me if you have any questions about this item and I will reply as soon as possible.