YoYoFactory Yo-Yo Counterweight Set - 6 Pack - 1 White Rubber and 5 PO| YoYoSam
Now you can buy your favorite Yo-Yo by Play Style here - La Tienda Del YoYo
Amazon.com: Professional Responsive Aluminum Alloy Yoyo for Kids and Beginners with 1A, 3A, 5A String Stricks, High Speed Yo-yo Bearing Toy, Party Favors (B) : Toys & Games
5a Freehand YoYo Introduction - How to Yoyo - YouTube
Yoyo 5a counterweight by LucidityCrash | Download free STL model | Printables.com