2pcs matched Vacuum Tube Gold plated Russia TUNG-SOL 6SL7 Replace 6N9P 6H9C
2pcs matched Vacuum Tube Gold plated Russia TUNG-SOL 6SL7 Replace 6N9P 6H9C
2pcs matched Vacuum Tube Gold plated Russia TUNG-SOL 6SL7 Replace 6N9P 6H9C
2pcs matched= 1 matched pair