J head fan duct

thingiverse

This component cools down the PLA through its exhaust, and features two holes for Peek cooling. Ideal if you've experienced a jammed extruder. The 2 inclined 'ears', at a 7-degree angle, accommodate 2 white LEDs. The holder part is positioned at a 45-degree angle to ensure unobstructed views of the extruder tip. Note that the photo displays an older version of this duct, with a distinct attachment system.