Yoyo King Proto9 Professional Unresponsive Metal Yo-yo with Angled, Wide C Bearing with 10 Balls and Included String Launched on Kickstarter, the popular Proto9 yoyo is now available on Amazon! Constructed of aircraft quality 6061 aluminum. Anodized for color, added strength and corrosion resistance. Now comes with narrow, responsive bearing installed so it will wake up. Wide bearing also included for nonresponsive play. Take apart design for ease of changing and untangling string. Solid black on one side, with Proto9 written on the other. Silicone pads for binding-required, unresponsive play. Width 42.2 mm, Diameter 52.8 mm, Weight 68 grams. Incredible catch zone. Wide, flared gap. Comes with a wide C bearing, with a channelized, angled shape to keep the string centered during advanced play. Long sleep times. Ball bearing axle. Terrific for advanced string tricks. Unresponsive play with the wide bearing DOES NOT WAKE UP and requires a bind to get back to your hand. For advanced players who know how to bind only, or are willing to learn. Want your yoyo to wake up for traditional yoyo tricks? Use the preinstalled narrow bearing that is now also included.