Description: 1. Enhanced Grip: Features a U-shaped bearing that securely grips the filament, ensuring smooth and consistent extrusion without slippage. 2. Gearing: Includes a 66-tooth plastic large gear made from POM and stainless steel, offering smooth engagement with the filament and robust feeding capability. 3. The extrusion arm idler is made of metal material. Our idler arm is made of aluminum and has a bearing, which is much the plastic one. 4. Upgrade small bearings. The U-shaped bearing can clamp the filament tightly and easily extrude the filament without slipping. 5. Black 66-tooth plastic large gear. ①:66 teeth, no burr treatment, smooth occlusion with the filament. ②:The extruder gear is made of plastic (POM) and stainless steel, which is widely used in industrial fields and is strong enough to feed filaments. Specifications: Due to different batches, there may be differences in product appearance and printed text, which not affect use Color: Black Material: Plastic+aluminum Package Contents: 1 * Extrusion Arm 1 * Gear Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.