### Core Function This part cooling fan is installed at the toolhead base and works with the air duct to rapidly cool extruded filament right after it leaves the nozzle. It ensures each layer solidifies properly before the next layer is deposited. ### Print Quality Improvement The fan significantly improves overhang performance, bridging, and layer adhesion while reducing stringing. Sharp details and crisp edges are maintained throughout the print. ### Compatibility This replacement fan works with Bambu Lab H2S 3D printers. It is a reliable third party replacement option that matches the required specifications for seamless integration.