Fangrui Product Details Please Check The Size To See If It Is Suitable For Your Yo-yos Bearing Specification Before Purchasing. The Precision Is Much Better Than Ordinary Kk Bearings, And No Lubricant And Other Auxiliary Products Are Needed To Achieve The Condition. The Biggest Advantage Of This Special Bearing Is That The Rope Will Be In The Center Of The Bearing As Much As Possible When Playing With The Ball, Which Reduces The Friction Between The Rope And The Wall Of The Ball. Improve The Idle Time, Reduce The Ball Power Consumption, And Play The Feeling Of More Smooth And Comfortable ~! [installation Method] 1, Unscrew The Yo-yo, Pass The Bearing From The Center, Then Screw The Other Half Of The Yo-yo Until It Is Unscrewed. Note: Over Rotate. 2,please Apply A Small Amount Of Yo-yo Grease And Yo-yo Maintenance Oil On The Side Of The Shaft And Bearing. 3,please Note That If You Apply Too Much, It Will Get On The Rope And Affect Play. Colour:silver Material:high Carbon Chromium Bearing Steel Size:12.70 X 6.35 X Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store