Dual 40mm fan duct for the NVIDIA Tesla Referral M10 - the same design shown installed and running quietly on our other listing.3D printed in-house from PETG plastic - higher quality than most 3D prints. Solid walls, crisp geometry, and eight brass threaded inserts molded into the print.Fits the Tesla Referral M10's fin stack with a snug flange lip and adds active cooling to a card that ships passively cooled - what homelab, LLM bench, and workstation builders need to run an M10 in open air.Everyxthing in the photos is the exact part you get. Ships in a padded bubble mailer or snug small box (whichever protects it best) - protection without excess packaging. Fans and screws are not included; this is the duct itself.Tested in continuous service on our own card. Questions welcome.