All rectifier tubes are being sold as single tubes & have been tested for micro phonics.  In addition, the buyer may choose to have their tubes cryogenically treated, FREE of charge, as an added bonus. This is the same cryogenic treatment that we offer on our Kr Audio Tubes.

Please Note - These rectifiers are being sold as single tubes, not pairs. Should you require matched pairs, we have them in stock; although in limited quantities.  A pair of tubes will carry the same shipping cost as singles so there will be no additional charge.  These tubes come in their original British RAF military boxes & in their original cigar rolls.