Description This single row deep groove ball bearing is widely applied to electronic equipment, food machinery, packaging machinery, medical machinery, printing machinery, textile machinery, machinery, equipment, etc. They have 2 metal to protect the bearing from dust or any possible contamination. These bearings are pre-lubricated with grease. Features - : UEETEK- Model: 624ZZ.- Color: Silver.- Material: Durable metal.- Inner Diameter: 4mm/ 0.16 inch. Outer Diameter: 13mm/ 0.51 inch.- Thickness: 5mm/ 0.2 inch.- Groove ball bearing for 3D printer and other equipments.- Closed with 2 Metal Shields, one Shield from each side, to protect the bearing from dust or any possible contamination.- Commonly used for Electric Motors, Wheel Bearings, Agricultural, Conveying and much more.Packing list: 10 * UEETEK 624ZZ 4mm x 13mm x 5mm Single Row Shielded Deep Groove Ball Bearing