These 4/4 professional violins are different than our other violins in that the material used comes from the Zizyphus Jujuba which is a Chinese fruit tree. The chin rest, the pegs, the tailpiece, and the fingerboard are all wood. There are no plastic pieces. These violins are hand crafted to perfection and metal fine tuners are used to make these violins even that much more professional. They have a warm bright sound and hold their tune great. They come with a case and a tuner and free 15 to 30 day shipping (estimated shipping time).