Amazon.com: NEW LON0167 5 Pcs 10mm x 7mm Through Hole Mini Electret Microphone Condenser Pickup(5 Stck 10mm x 7mm Durchgangsloch Mini Electret Mikrofon Kondensator Pickup : Musical Instruments
50 Pcs 9*7mm Capacitive Electret Microphone Pick-up Sensitivity 52d Mic Electret Condenser 9mm X 7mm With Pins - Acoustic Components - AliExpress