1. YoYo plain bearing 2. concave or flat bearing for option 3. MR105 ... Size: 5x10x4mmBearing is the part in between the 2 sides of the yoyo and is fitted onto a ... Material Option:1.Material:carbon,chrome,stainless steel,iron,ect.2.Sealing from:2RS ZZ ,Z ,RS,OPEN (metal ... . Our products with advanced equipment,mature techniques and with high precision, low noise, long-life and excellent reliability. Our ...