If you need to couple a 30mm fan to a 22.3mm cylinder then look no further! The beautiful new E3D v6 fan ducts are injection moulded out of translucent blue polycarbonate. They are much harder wearing than printed parts and because they are manufactured to tighter tolerances they are significantly less prone to vibration.
ReprapWorld is the number one webshop for all your reprap supplies for your 3D printer. We have a large collection of 3D printer components, from our famous electronics lines to filament from our own production. And everything is at a very competitive price!