### Dual Ball Bearing Inner Structure Delivers Long Service Life & Low Running Noise Double ball bearing rotor reduces rotating friction, effectively lower working noise and extend fan lifespan against long continuous operation. ### Powerful Airflow Design Accelerates Hotend Heat Dissipation Efficiently Optimized fan blade layout outputs strong steady airflow to rapidly take away residual heat and avoid pre-melt filament clogging. ### Full-set Matching Printed Protective Housings Prevent Foreign Matter Into Fan Blade Complete honeycomb grille + fixed bracket + cable strain relief shell block dust and debris from damaging internal fan. ### Pre-terminated Standard Pin Wiring Matches Original Printer Circuit Definition Pre-crimped multi-core plug fits stock motherboard socket directly without cutting or rewiring cables. ### Full Hardware Pack Includes All Mount Screws & Allen Spanner For One-step Install All required fixing fasteners and tool supplied together to finish replacement without extra accessory purchase. ### Direct Plug-in Swap Fix Overheating Caused Feed Jam & Abnormal Print Defect Full set replacement for worn failed stock fan to solve hotend overheat clogging and poor layer printing issue.