D Z Strad Model 401 Carbon Fiber Cello Bow with Fleur de lis frog (Carbon Fiber Bow) 4/4 (full size) braided carbon fiber, fully silver-lined, round stick with polished ox horn frog and fleur-de-lis inlay Carbon fiber stick is more resilient and less susceptible to changing environmental conditions than traditional wood Perfect Weight Excellent Balance and Fast Response Properly balanced for even playing response; produces a powerfully dynamic sound Good for professional players and serious players.