Bucci Bridge pins are precisely machined so the taper is a consistent .210" to .170" taper. Water Buffalo Bone is used, sometimes dyed black. Special orders of Fossilized Mammoth tusk and Fossilized Walrus tusk may be available, on request. These pins are reputed to enhance the tone of your instrument. PolyAcoustic is a proprietary material that is comparable to bone and has a speckled grey appearance. Price of Bucci pins is $60. USA so will vary with each shipment due to the exchange rate at time of shipping !