27mm Piezo Pickup Kit for Cigar Box Guitars & Acoustic Instruments - DIY Do it Yourself - Components include: 1/4" Mono Jack, Piezo Disc, 500K Volume Pot & Knob, Leads DIY Kit - Piezoelectric Pickup with Volume Control Requires Soldering & Minor Understanding of Circuits See item pictures for wiring diagram High Quality 27mm Piezo (Pre-wired) - 2 pieces Included (One for Spare) Alpha Mini 500K Volume Pot, Black/White Knob & 1/4" Mono Jack Provided 24" Of Black & Red Stranded Wire Provided for wiring