I've bought a lot of things from vevor, but this is the biggest disappointment I've ever had from them. My friends taunt me as much as I recommend vevor tools, and other equipment. My shop is literally vevor orange ( you guys should send me stuff to review like you do tik tok people ). The thing with these is they give you 90 feet of piping, but nowhere near enough couplers to complete a 90 foot run. If you're doing a few runs for a small set up they may be fine, but if you intend to use the full 90 feet as a pro shop set up prepare to buy 3 kits and have all kinds of left over piping. From the 2 kits I had to buy I have 2 straight fittings, 1 T, and 5 90° . Now I haven't even opened the second kits pipes they're still wrapped in bubble wrap!!! But get this I still have 4 pipes left of the 1st kit I ordered ! That tells you they severely lack in couplers to piping, and when asked they say they do no sell individual fittings, but they should sell the packs they put in the kit individually for sure , because you will definitely need them. So take it from a vevor fan I would not buy these until they decide to manufacture coupler kits for this, because you will need them. Now the good they do work, but be careful with the o-rings and check the o- rings before tightening everything down, and spray with soapy water to lubricate, or you'll be chasing miniscule leaks.