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The KonKave bearing is designed for Smoother multi-layer string tricks with Longer Spin times. Not only does it help keep the string centered ... it also forces additional string layers to the center and away from the sides of the yoyo.

Whether you are a Beginner or Advanced player ... With a Dif-e-Yo KonKave bearing you will experience a Smoother and more Predictable playing yoyo

YoyoJam Koncave bearing kit from frank dif-e-yo fits most all yoyojam yoyos please note you use shims at your own risk as they are not an official yoyojam product .. comes with 3 pairs of shims to tune your yoyo as you like it