ITEM NAME:3-pack 25mm Piezoelectric Disk Elements with 2 inch Leads W4S6 3-pack 25mm Piezoelectric Disk Elements with 2 inch Leads W4S6 Great for Acoustic Guitar Pickups, cigar box guitars, drum triggers & more! 25MM outside diameter with pre-soldered 2-inch leads High-quality piezoelectric transducers manufactured Can be wired in series or parallel to create contact pickup arrays This is a nice entry-level pack of 3 high-quality piezos, pre-wired with leads to save you having to solder the leads on yourself. They can also be used for custom pickup arrangements in more traditional stringed and percussion instruments. Plate Diameter: 25mm Lead Length: 100mm Plate Material: Copper Resonant Frequency (kHz): 4.6 +/- 0.5kHz Resonant Impedence (ohm): 300 max. Capacitance (nF): 20.0 +/- 30% [1kHz] Package Contents: 3 x Piezoelectric Disk Elements Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..High-quality piezoelectric transducers manufactured.