LM10UU Linear Motion 10mm Ball Bushing LM10UU Linear Bushing works with 10mm Shafts, Bearing inner Diameter is 10mm, Bearing outer Diameter is 19mm and Bearing Length is 29mm4pcs LM10UU 10mm Linear Ball Bearing Bush Bushing 10*19Linear Motion Shafts, Ball Bearing Steel Cylinder Rail Linear Shaft Straight Round Rod, Linear Motion 10mm Shafts/Rods/Guides(500mm)  Linear Motion Shafts, Ball Bearing Steel Cylinder Rail Linear Shaft Straight Round Rod, Linear Motion 10mm Shafts/Rods….  LM8UU Linear Ball Bearings 
LM10UU 10mm Linear Ball Bearing Linear BushingLinear bearing ball cage, hardened coat of both ends ring.  LM12UU Linear Bearing.  Machifit LM8LUU Linear Motion Ball Bearing12pcs LM10UU 10mm linear bushing linear bearing CNC part10pcs LM12UU 12mm Linear Motion Ball Bearing Bushing for 12mm Rod 3D Printer CNC Parts $15.69.  CNC Part MR9 9mm Linear Rail Guide MGN9 Length 200mm with Mini MGN9H Linear Block Carriage….  CNC Part MR7 7mm Linear Rail Guide MGN7 Length 100mm with Mini MGN7C Linear Block Carriage…LM10UU Linear ball bearing | 3D printing expertsLM10UU 10mm linear ball bearings can be used in combination with smooth rod for linear motion in your 3D printerBearing vs Bushing, LM10UU. - YouTubeI will give the plastic a try in the 3D printer. Not sure how long they will last