Asayu 40 Pieces Aquarium Air Valve Connector Plastic Inline Tubing, and 5 Pieces Suction Cups 5 Pieces Check Valve

It can be used for different connections in the aquarium. Good price-product ratio.

If I could split this review up I would, the connection pieces are all solid, work well with no issues, 5/5 stars all the way. The 1 way valve leaks water both ways on 3 of the 5 that it came with in my set. If you need connections, this is a real bang for your $ which is why it gets 4 stars, but I would just toss the valves and get some better ones.

Not too much to say here, but the back-flow valves work great, and there's a lot of adapter pieces to use to keep your air hose from kinking over the top of the tank. Great kit to just have on the shelf for everyday use.

Great value for the money! None came broke or malfunctioning. Provides a nice tight fit on air lines. Plus being transparent is a plus on clear lines. The suction cups work awesome! I have no complaints about any of the pieces. Also received very quickly! Will do business again!

Cheap plastic but they do the job.

These are a good value for the quantity you get.

Everything is great with nice clear plastic. Tons of connector options to choose from. Like many others have written, buy backflow valves separately. I couldn't even get these ones to open breathing full force into them, so they definitely don't let any air through when using my little 20gal tank pump.

Great item with plenty of options