1. Bone bridge saddle and nut are made of real cattle bone. The bone has porosity and a great appearance. Density and porosity are features that yield good intonation. 2. 6pcs bridge pins are made of brass with green abalone dot and brass circle on the head. These pins enhance the appearance of your guitar. Their density and rigidity allow for better vibrational transfer compared to plastic, improving sound quality. 3. Fits most standard acoustic guitars. These are not only functional bridge pins but also add an elegant appearance. 4. If you haven't tried brass pins, you may not have experienced their advantages. Feel the improvement in sound quality. 5. These bridge pins can replace lost or broken ones and are a great accessory for your acoustic guitar. Bone Nut Size: 43mm x 6mm x 8.5mm Bone Saddle Size: 72mm x 3mm x 9mm Bridge Pins: Length: 30mm, Top Diameter: 7.6mm, Bottom Diameter: 4.5mm Color: Gold + White Material: Brass + Bovine Bone + Plastic Package Contents: 6 x Bridge Pins 1 x Nut 1 x Saddle 1 x Pins Puller Only the above package content is included; other products are not included. Note: Light and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement may vary by +/- 1-3cm.