The items are all of middling quality, but the kit itself is useless. There are no instructions, and it lacks 2 or three required components to make the system functional. There is no coolant pump, no air compressor, and no power supply for the solenoid. There are also no setup instructions.There are some very minimal instructions on the product page here, but they give air pressure in kilograms, which is not a unit of pressure (im a physicist). The demonstration videos on the product page conveniently have the tubing for the supply lines running off screen, presumably not showing components which are not included (but again, required).Looking around to find some of the other necessary components, it looks like i’d spend about as much as an actual quality kit (in the $300 range) to complete this setup. Lesson learned. Just spring for one of the good kits and avoid wasting your time and money.