4Pcs LM4UU Linear Bearing Nickel Plated 4mm Bore 8mm OD 12mm Length

Description:

1. Provides linear Ball Bearing with seals on both sides to prevent ingress of dirt, water, and foreign matter.

2. Linear Motion Bearing (also called Ball Bushing or Shaft Guiding) is a rolling friction supporting element that is usually used for linear motion mechanical parts with small friction.

3. Coordinate with Linear Motion Shaft, recirculating balls provide unlimited stroke at low friction movement

4. It is great for 3D printers, CNC, and other applications.