Created for the advancing string player, the Glasser Advanced Composite Viola Bow feature sticks made from Glasser's own proprietary advanced composite. The bows are mounted with the highest quality German-made ebony frogs from Paulus. The frogs are fully lined with a white mother of pearl slide and double eye. All advanced composite bows are nickel silver mounted with a wire grip. AC bows are Glasser high-gloss brown with premium white unbleached horsehair.