You are looking at sfour very nice NIB RCA USA 6887 double diode tubes. Three are marked RCA and one Stromberg but all are genuine RCA and come in RCA boxes. These tubes are in excellent condition, the boxes have storage damage. They measure stronger than new on both components. Tubes all measure at greater than 10.0. These are strong tubes as new measure for the 6887 is 10.0. 

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 15,000 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.

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 worldwide where shipping with tracking is $28. Some destinations are more expensive Please Email me to know the specific shipping cost to your country.e if you have any questions about this item and I will reply as soon as possible.