About this item Compatible with X1 series Bamboo printers only, NOT compatible with P1 series and A1 series The Cooling Fan for Hot end is used to cool and reduce the temperature of the ceramic heater. Smooth Rotation, No Stuttering, Long Lifespan; Smooth Airflow, Good Heat Dissipation Dimensions 25x25x10mm, four wires, 15,000 rpm, 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. This produce is cooling fan forbambulab x1 series,not Chamber Temperature Regulator Fan.