Features: Engineered with high hardness metal, this active extrusion gear delivers exceptionally durability and heat resistance, ensuring smooth materials transport for Lab printers' Automatic materials . Precise 28x22mm gear features wear resistant and optimized tooth for consistent torqued transmission, minimizing filament slippage during prolonged printing operations. Ideal for professional printing enthusiasts and industrial users requiring reliabled components for high frequency materials switching and extended printing. Maintains highly performances in heated printer enclosures or intensive multi materials projects, preventing downtime caused by gear deformation or materials feed failures. Directly compatible for Lab , this OEM grade replacement part restores precise filament control while exceeding original equipment longevity standards. Specifications: Materials: Metal Size: 28mmx22mm/1.1x0.86in For Lab Printer Automatic Properties: High hardness/durability/heat resistance/smooth transmission Suitable for Lab automatic materials Package Includes: 1PC Active Extrusion Wheel Assembly note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.