20PCS 35mm Piezo Discs, Uncased, Gold, Electronic Drum Triggers

szzijia 20PCS 35mm Prewired Piezo Elements Buzzer Sounder Sensor Trigger Drum Disc

LOCHSOEL 6.35mm (1/4inch) Female Stereo Socket Panel Mount Jacks, Patch Cables, Microphone Connector Adapter 6 Pack-Lageter

YQBOOM 10PCS 41mm Piezo Disc Transducer Contact Microphone Trigger Sound Sensor with 3.94 Inches Wires for Acoustic Instrument，Mic Drum Trigger Acoustic Pickup CBG Guitar