1The nut of this product is approx. 42mm, using ABS material. The length of the fret is about 4364mm, the material is cupronickel. 2This product is a 4string 21fret bass guitar neck, which has been polished to form a finished product and can be used. 3The material of this product is Canadian maple, which makes the sound louder and lasts longer. 4This neck is also very suitable for novices, with marked points on the side, which is convenient for distinguishing different frets. 5There are three colors to chooes and the product is a musical instrument replacement accessories.