Strong toughness and long service life: Made of rubber, this drive belt resists stretching and deformation even after long term use, helping to extend the belt life. Broad compatibility: Designed for Neptune 4 timing belt systems, Neptune 3Plus/4Plus machines, and is suitable for Xaxis and Yaxis belt drives in 3D printers. Also compatible with Neptune 3Max belt configurations. Flexible and quiet operation: The belt delivers strong flexibility for smooth, quiet motion, providing consistent performance under a range of operating conditions. Engineered for reliable performance: This drive belt provides trustworthy power transfer and smooth operation in compatible drive systems, including applications in electric motorcycles where applicable. Use scenarios: Replacing worn belts on Neptune 4 or Neptune 3Plus/4Plus to restore accurate X/Y axis movement and improve print quality. Upgrading the Xaxis or Yaxis belt on compatible 3D printers to enhance timing accuracy, reduce backlash, and maintain quiet operation. Replacing belts on Neptune 3Max or other Neptune models to maintain consistent motion performance across printing tasks.