3-pack 41mm Piezoelectric Disk Elements (Contact Pickups) with 2" Leads Great for Acoustic Guitar Pickups, cigar box guitars, stomp boxes, drum triggers & more! BIG 41mm outside diameter with pre-soldered 2-inch 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