GATES 2GT True Profile Pulleys and Idlers - 5mm bore

Picked these up for my Trident build. If you're running Gates belt you might as well run matching Gates pulleys and idlers — no point pairing quality belt with off-brand motion hardware that doesn't hold true profile tolerances.
Fit is exactly right, finish is clean, and they spin smoothly. These are the same components West3D uses in their own Berserker motion kits, which tells you everything you need to know about confidence in the product.
Not much more to say — they're Gates, they're correct spec, they work. Buy them.

The quality and finish of these is indistinguishable from true Gates pulleys.

The teeth match perfectly with the teeth. You can't really get pulleys better than this.