Direct replacement fan with easy installation specifically engineered for 4020 blower fan slots in printer models, backed by 10, 000+ hour life certification Features double ball bearings for enhanceds durability and airflows control, coupled with ABS housing that continuous high temperature printing Maintains nozzle temperature during prolonged printing in workshops, maker space, or home baseds printing setups for printing enthusiasts and professional maker requiring thermals management for printer upgrades and maintenance High efficiency cooling blower fan for / K1MAX / K1C printers ensures rapid heat dissipation from hotends while maintaining whispers quiet operations under 25dB