4 Pin Cooling Fan for Bitmain Antminer S9 F1 Innocilicon T2T M20S M3X Miner fan Brushless DC 12V
https://www.vogueparade.com/shopping/EN/142001/1/1005003305470423/4-pin-cooling-fan-for-bitmain-antminer-s9-f1-innocilicon-t2t-m20s-m3x-miner-fan-brushless-dc-12v//