100% Brand new & high quality Fit for most string music instruments such as guitar violin mandolin etc. Fitting instructions: 1. Remove the plastic film from the back of the transducer to expose the adhesive. 2. Place the transducer through the sound hole to the lower part of the front body where the guitar produces the best tonal response 3. glued to the bottom side 6.35 single audio is fixed at plastic film. Package included 1 * Pickup Piezo Transducer 1* Film 2* Bolt 1* Cable tie