Mid launch, and mid/low spin. The Diamana™ BF-series represents the next generation version of MCA GOLF’s signature “smooth” bend profile. The new BF-series, like its most recent predecessor the Diamana™ B-Series, incorporates high-strength DIALEAD® Pitch Fiber by Mitsubishi Chemical into the butt-section of the shaft, adding unprecedented strength and control during shaft loading and unloading.