688Z Ball Bearing 8mm x 16mm x 5mm 3D Printer Accessories Double Shielded Deep Groove Bearings for V Slot NEMA 23 Motor L inear Guide Silver Metal Pack of 10: Amazon.com: Industrial
Amazon.com: 688-2RS Ball Bearing 8x16x5mm,ABEC-3 8x16x5 Blue Rubber Sealed Ball Bearings (Pick of 10pcs) : Toys & Games