This item is a practical cello/violin bow frog, which is made of copper, metal. It has bright sound and on fingers, fits for professional player to use. A wonderful cello/violinbow frogfor you to replace the old or damaged one. Features - Color: Black - Material:Copper, metal - Bow Frog Size: About 4.50X2.00X1.20cm/1.77X0.79X0.47in - Screw Size: About 5.20X1.20X0.80cm/2.04X0.47X0.31in -The material is safe and durable, which is wear resistance and practical for the long time use. - It has a simple design, but very practical in use, giving you a good using experience. -Great replacement for your old, dirty or damaged bow frog, the bow button screws is included. - The design of Violin/Cello Bow Frog is simple but easy to use, giving you a good experience. - Easy to apply andinstall, very close to the string, the sound is particularly full and comfortable.Packing list1 x Violin Bow Frog1 x Screw