General description Double side seal linear motion ball bearing bushing, perfect for linear motion applications such as 3D printers and CNC machines. These ball bearings feature two rubber dust seals to prevent the entry of dirt and foreign matter, ensuring smooth movement and low friction. They are designed for high rigidity and long life, making them economical and easy to maintain and replace. Technical specifications Material: Bearing Steel, Rubber Color: Silver Weight: 197g per piece Model: LM25UU Outer Diameter: 40mm Inner Diameter: 25mm Length: 59mm Measurement allowed error: +/- 1-3 cm Other information Package Contents: 6 x Linear Bearing Note: Light reflection and different displays may cause the color of the item to differ slightly from the real thing. Bearings may require lubrication and a break-in period.