Features 【Aluminium Alloy Linear Bearing】: Linear motion bearings are made of aluminum alloy material for maximum rigidity and load capacity. 【Optimal Guide Units】: Optimum guide units for a high-precision, flex-free sliding system with smooth movement, stable performance and reduced cost and time. 【Corrosion-resistant properties】: They have an exquisite appearance, a surface treated by special grinding and hard chrome plating processes, which gives them rust, abrasion and corrosion resistance properties. 【Precision Roller Bearings】: Precision roller bearings that do not need to be lubricated and are suitable for quiet, fast and accurate equipment. 【Satisfaction Guarantee】: We support our best service, high quality aluminum linear bearing CNC parts. Open linear ball bearing slide block. If you have any questions about our products, please do not hesitate to contact us. We will try our best to help you and reply within 24 hours. Features: 1. 100% brand new and high quality. 2. Made of aluminum alloy material for increased storage capacity and durability. 3. Chrome plated surface, beautiful, wear-resistant and corrosion-resistant. 4. High hardness, low noise and rustproof. 5. Suitable for quiet, fast and precise devices. Specification: Model: SBR16UU Material: aluminum alloy Shaft diameter: 16mm Weight: 585g (approx.) Package list: 4 * SBR16UU bearing block Package List