ITEM NAME:Bridge Transducer Under Saddle Ceramic Piezo Pickup for Acoustic Guitar Accs Description: Piezo Ceramic Pickup with 2.5mm Diameter jack Under saddle pickup for 4 String Acoustic Guitars Bass Solid construction provides a wide range of frequency response from high frequency to low bass tone Also provides high output Suitable for 4-String Acoustic Guitar Bass Material: Ceramic & Copper Size Chart: Wire Length: Approx. 350mm/13.78inch Pickup(LxW): Approx. 84x10mm/3.31x0.39inch Package Includes: 1 Piece Piezo Pickups Note: Due to manual measurement, there may be 1-2mm error in size.Under saddle pickup for 4 String Acoustic Guitars Bass. Suitable for 4-String Acoustic Guitar Bass. Material: Ceramic & Copper. Pickup(LxW): Approx. Solid construction provides a wide range of frequency response from high frequency to low bass tone.