Features: Both gears are made of hardened steel and plated nickel, which helps prevent rusting for long-term use. The hardened steel extruder gear assembly is an internal component of the extruder unit and includes a driven gear and an active gear that work together to feed filament into the hotend. Built with durable materials, the extruder gear assembly is designed for long-lasting performance. If wear or clogging occurs over time, the assembly can be easily replaced. Thanks to its hardened steel gears, the extruder is capable of printing with abrasive engineering filaments such as carbon fiber nylon and glass fiber nylon. The P1P stainless steel extruder can be upgraded to a hardened steel version by replacing the extruder gear assembly. Specifications: Reduction Ratio: 9:53 Supported Filament Diameter: 1.75 mm Supported Filaments: PET, PAHT, PA6, PLA, PETG, ABS, ASA, PC, TPU For P1P Owners: The original extruder gears are made of stainless steel. When printing with abrasive filaments like carbon fiber nylon or glass fiber nylon, the gears may experience wear. In such cases, use of this hardened steel gear assembly is recommended. Color: Yellow Material: Hardened steel + plastic Package Contents: 1 x Extruder Gear Assembly Note: Light reflection and different displays may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.