The Circuit Board is Used For Repairing and DIY The Neumann u87ai Microphone

DIY Circuit Board for Large Diaphragm Condenser Microphone Powered Phantom-Power

Gold-Plated PCB Full Kit For Neumann U87ai Microphone Repair & DIY

NEW DIY Circuit Board for Large Diaphragm Condenser Microphone 48V Phantom Power

The Complete Set Of Microphone Metal Casing For Neumann TLM103（Aftermarket）

Avantone Pro Demo Lg Diaph Tube Condenser Mic

U87AI microphone holder, compatible for Neumann repairing original microphones

AKG P120 Condenser Microphone Project Studio Line - Black (P120)