Coming from Vortex Racing is their new Aeris fan duct for common 30mm fan units. The duct has been optimised to keeping the motor as cool as possible for increased overall performance and less fading towards the end of a run. While cold air is forced through the fan and duct, a specially-shaped air vent helps hot air to escape which further increases cooling performance. Two recessed sections on the sides allow for easy fan insertion and removal. The duct is made of high-tech resin for exceptional durability and less changes or cracking.