10pcs U-Groove Bearings U604ZZ 4x13x4mm Wheel For 3D Printer Idler Belt Pulleys Guide Rail 604UU Extruder Parts For 3D Printer

Origin : CN(Origin) Model Number : U-Groove Bearings U604ZZ Material : / Material : Carbon steel Size : 4x13x4mm Material: Carbon steel Groove width: 2mm Groove depth: 1mm Model:U604ZZ Quantity:10pcs This section bearing feel smooth, low noise, long service life. It iss suitable for motor, toys, model, instruments and meters, electric tools, communications equipment, fitness equipment and other fields.extruder round wheel gear fitting pulley...It's brand new, good quality & high performance. There is 0.1-0.3mm deviation of measurement in the photo. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you for your understanding!