I have 24 of these chrome-plated brass ball valves. Extremely smooth action on the ball valve, and completely resilient to all grow-related stuff (nutes, oxidizers, cleansers, etc). I used these for a system designed by "GrowerMD" on youtube via a video called "Watering System Manifold Explanation". The system worked well for my needs, but I've since changed locations and equipment. These are pricey when buying new.. 8$ a piece via amazon prime, which would come out to 192$. I'm letting all 24 of these go for 80$ with free shipping. Cash App only, or paper currency if you're willing to send first.