Hard to complain for the price
All in all, exactly what youd expect. Mine didnt have the best fitment, it seems like it would function better if the upside down U shape was wider so it would sit flush. It doesn't wiggle at all though so it is a snug fit. I also prefer a little more restriction out of a carb cap. That being said, I use mine by capping my nail with the flat part and resting one of my fingers on the airflow tube, allowing me to get many levels of restriction.