Thermalright TR TY-140 140mm x 160mm PWM Fan PWM fan, provides simple and easy adjustment of fan speed with the latest ETC IC. Seven Silent Torpedo Blades - submerges, gives most quiet and efficient airflow Enhanced Hyper-Flow Bearing (EHFB) - to ensure consistent and stable rpm, prolonged lifetime of usage. Aerodynamic bodyLess friction around the edges and give more centered and concentrated airflow. 12 cm mounting holeallows installation on the 12 cm dimension, so will be compatible with most coolers without having the need to buy extra kit for 14cm fan.