YYF Hub Stack Kit W/ Bearings String Tricks (1A) -Make your yo-yo as nearly

-Make your yo-yo as nearly unresponsive as possible when combined with a wide gap

& Ultra Light:

Professionals around the world are beginning to choose Kitty String as their weapon of choice in competition and for good reason

World Champion Michael Nakamura Signature Model

YYF Hub Stack Kit W/ Bearings String Tricks (1A) -Make your yo-yo as nearlyYoYoFactory's Hub Stack technology opens a whole new world of pull starts, unique grinds, and allows you to grab your yo yo while spinning and hold it in your hand! This kit includes everything you need to add hubstacks to your hubstack compatable yoyos. 2 size A Bearings, 2 hub stacks, and 2 o rings. YoYoFactory Hub Stacks!