Reference Cardioid Retube Kit Version B
This kit is only for Manley REFCARD's serial numbers with a:
T, X, or 7P in their serial number (REFCARDT001+ or REFCARDX001+ or REFCARD7P001+)
Includes (1x) Mic Grade 12AX7 or 12AT7. Be aware that some tube brands are subject to change over time and may not match the pictures shown.