1. High speed, low noise, long life2. High temperature resistance, high precision, excellent products3. Bearing ring: contains inner ring and outer ring; high quality steel support, high efficiency to extend bearing life4. Rolling body: transfer the load between inner and outer ring5. Cage: reduce friction heat, optimize the load, easy to disassemble6. Integral seal: significantly extend the bearing life, retain the lubricant in the bearing to keep contaminants out of the door7. Metal sealed bearings: good speed, high temperature resistance, suitable for high-speed operation8. Rubber sealed bearings: good dustproof effect, suitable for use in harsh environments, dustproof and waterproof9. Open type non-sealed bearing: good speed, silent, suitable for closed machinery inside10. Inner diameter: 4mm11. outer diameter: 13mm12. width: 6 mm13. Precision grade: P014. Cage and material: nylon cage15. standard number: CB/T 307.3-201716. weight: about 1g/pcSpecification: Package Weight One Package Weight 0.03kgs / 0.06lb One Package Size 6cm * 6cm * 2cm / 2.36inch * 2.36inch * 0.79inch Qty per Carton 500 Carton Weight 14.00kgs / 30.86lb Carton Size 50cm * 30cm * 32cm / 19.69inch * 11.81inch * 12.6inch Loading Container 20GP: 555 cartons * 500 pcs = 277500 pcs40HQ: 1289 cartons * 500 pcs = 644500 pcs