Features: Engineered replacement extruder gear for series printers, featuring full metal alloy construction to remove filament slippage and wear from abrasive materials like PA /PC/. machining machined gear teeth with optimized tooth profile smooth filament feeding and enhanced durability compared to stock plastic components in high temperature printing environments. Ideal for /K1C/ owners experiencing under extrusion issues or those upgrading extruder execution for engineering grade filaments and prolonged printing meetings. Restores consistent layer adhesion and print quality during intensive printing projects requiring nylon composites, blends, or other abrasive specialty filaments. Complete set includes precisely sized drive/Idler gears and installation tools for direct OEM fit replacement without modifications, backed by dimensional accuracy matching original extruder assemblies. Specifications: Substance: Metal Size: 16.4×16mm Applicable model: Applicable to /K1MAX/K1C All metal substance, more wear-resistant Can replace original wear gears and be consistent official extruders Package Includes: Series extruder transmission reducer gearx1 note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.