PETG Fits nice. File the tabs on the fang though and the clips they slot into. My fang broke because the tolerance was too tight. Holes in the fang for the fan need drilling out a bit to 2.2mm so you can run a 3mm tap through them. When fitting put the heat sink fan in place, Don't screw it there. You need to move it out the way to get the fang to clip in, to get the wire to go between the bracket and the fang. Nice design.