Specification Plate Material: Brass. Resonant Frequency: 1.8 +/- 0.3 KHz. Resonant Impedance: less than or equal to 300 Ohms. Static Capacitance: 50000PF +/- 30%. Storage Temop:-30 degree Celsius-+70 degree Celsius. External Diameter: 35mm / 1.38 Inch. Inside Diameter: 24mm / 0.94 Inch. Lead Length: 10cm /3.94 Inch. Package Contents: 15 PCS. Suitable for DIY projects, contact microphones, cigar box guitar pickups, touch sensors, drum triggers, homemade speakers, buzzers, etc.
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