Item Type: Violin Pickup Set Material: Copper + Plastic Pickup Rod Size: Approx. 43 x 5.6mm / 1.6 x 0.2in (manual measurement has 2-3mm error) Audio Plug: Approx. 2.5 mm / 0.09in End Pin Socket: Approx. 6.35mm / 1/4in Package List 2 x Knob 1 x Pickup Rod 1 x Pickup with Transducer 1 x Socket 1 x Fixed Wire Reel 4 x Screw 7 x Screw Loop Please note that the transducer must be placed on a flat exterior, so it cannot be used for traditional violinsfor solid bodies or other designs with flat points under the bridge. 1You can use this complete pickup kit to make your own electric violin sound 2Since the pickup in the kit is no noise, you can perfectly release the sound of your violin 3Very suitable for violin players to improve the sound of the violin, easy to install and use 4Can meet the different needs of daily life, and very convenient for music lovers and violin lovers 5Violin parts can provide good maintenance for the instrument and reduce wear and tear, and extend the life of the violin