Piezoelectric Sensors - 6 Pieces 20mm / 27mm Piezo Disc Elements with 10cm (4") LeadsFeatures Great for Acoustic Guitar Pickups, cigar box guitars, drum triggers & more! Pre-soldered 10cm (4 in.) leads High-quality piezoelectric transducers manufactured by Murata See products specs and measurements in the description text below Can be wired in series or parallel to create contact pickup arrays Description:Plate Material: BrassIt's suitable for installing in cigar box guitars, foot stompers and other home-made instrumentsThey can also be used for custom pickup arrangements in more traditional stringed and percussion instrumentsEasy to install, convenient to useResonant Frequency (kHz): 4.6 +/- 0.5kHzResonant Impedence (ohm): 300 maxCapacitance (nF): 20.0 +/- 30% [1kHz]Plate Diameter:Approx. 20 / 27 mmLead Length: Approx. 10cm (4 in.)Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item, Thank you! Package Include:6 pieces Pickup Piezos Discs with LeadsFree Shipping - Allow 30 daysCALIFORNIA PROPOSITION 65 WARNING WARNING: Cancer and Reproductive Harm - arnings.