The String Centre FG Series Fiberglass Violin Bow 1/2 Size FG Series Fiberglass Violin Bow 1/2 Size Through the careful exercise of engineering and science, The String Centre FG Series Fiberglass Bows are highly affordable, yet provide a level of sensitivity, balance, and nuance previously unattainable in economical fiberglass bows Through the careful exercise of engineering and science, The String Centre FG Series Fiberglass Bows are highly affordable, yet provide a level of sensitivity, balance, and nuance previously unattainable in economical fiberglass bows