These are for 3 Arctic P12 fans. This is the one that can daisy chained. It has no RGB and it is PWM fans.

These are for radiators and for intake on case that has restrictive airflow. They are quiet in relative term.

It is included with set screws to mount on to a case. I think new set of 5pk goes for $35. I didn't need 5. This deal is ideal for someone who wants set of good radiator fans with non-rgb.