This is a YAMAHA 4/4 violin carbon fiber bow, model CBB101. Length: 74.5cm Weight: 61g Hair replaced in September 2024. After the hair replacement, rosin was applied and it was test-played for about 30 minutes. It's a spare bow for practice, so it hasn't been used much, but it's not in perfect condition due to its age. I didn't feel much difference when comparing it to a wooden bow. No warping.