CUSTOM MADE : Compatible with Bambu Lab X1 series printers only, NOT compatible with P1 series and A1 series,No screws included HEAT DISSIPATION：The Cooling Fan for Hot end is used to cool and reduce the temperature of the ceramic heater.Smooth Rotation, Long Lifespan; Smooth Airflow, Good Heat Dissipation EASY TO USE：Double ball bearings, speed measurement PWM temperature control. The cooling fan is a high-speed rotating part, so do not touch it while it is running NOTE: This produce is cooling fan for bambu lab X1 series,not Temperature Regulator Fan.And NOT compatible with P1series and A1 series 3D Printer BACKED BY YIBEICO SUPPORT:Your satisfaction is our priority. If you have any questions or require assistance with the Cooling Fan,our responsive customer service team is readily available to help you. YIBEICO 2Pcs Hotend Cooling Fan for Bambu lab X1/X1C 3D Printer,Brushless Fan for Printer Cooling