TENSEI™ 1K Pro Core BlackAvailable Exclusively in Asia TENSEI 1K Pro Core Black, a Japan spec shaft, utilizes a new application of 1K carbon weave in the inner core layer, creating a solid, stable feel that increases strength in the shaft and lowers torque, while providing the signature 1K feel. Featuring high modulus carbon and a stunning holographic decal, the TENSEI 1K Pro Core Black is perfect for high speed players looking for low launch, low spin performance, great