Greenten Rod Piezo Pickup for Acoustic Guitar, 2Pcs 100% New 12" lead with 2.5mm plug, which can be cut off for wiring direct to jack,Best mounted under the saddle on an acoustic guitar A great way to add a pickup to your acoustic guitar,Rod Piezo designed for 6-string guitars, can be cut shorter made to be installed beneath the saddle of a standard acoustic guitar as a pickup device. These also work GREAT as pickups in Cigar Box Guitars. These rod piezos come with a 2.5mm plug at the end of a 12 1/2" braided lead. You can either cut the plug off and solder the lead direct to your jack, or you can get a 2.5mm jack and wire that into your circuit. These piezo rods are 2 3/4 inches in length