VingoBow 4/4 Size Black Horse Hair Carbon Fiber Viola Bow ***Only sold by VingoBow is ORIGINAL*** Carbon Fiber Stick. Sheep Leather Grip. Natural Horsehair Ebony Frog with Nickel Silver Fitted. Approx. 70g, 74.5cm. Good combination of strength, flexibility and balance! VingoBow - Professional and Specialized in Bows!