12Pcs 8mm Linear Bearing LM8UU 81524mm Motion Liner Ball Bush Bushing Ball Bearing LM Series CNC for Diy 3D Printer Prusa Mendel Reprap

12 Pcs LM8UU Linear Ball Bearings, 8mm Bore Dia, 15mm OD, 24mm Length with Double Side Rubber Seal Great for CNC, 3D Printer

SHKI 20 Pcs 608 2RS Ball Bearings – Bearing Steel and Double Rubber Sealed Miniature Deep Groove Ball Bearings (8mm x 22mm x 7mm) (608 2RS)

ReliaBot 2PCs 8mm x 350mm (.315 x 13.78 inches) Case Hardened Chrome Plated Linear Motion Rod Shaft Guide - Metric h8 Tolerance