zjxed 1/4" OD x 3/8" OD Pneumatic quick Connector Push to Connect fittings Straight reducer Union/Coupler (Pack of 10)

These were a great repair option for a water filtration system. I would suggest smaller quantity options.

Repaired an old 5mm air line instantly. Still in use after install 1 year ago.

I'm very satisfied with these connectors. Work the first time without any leaks. When I had to replace a line, I did have a minor glitch trying to reuse one. This was no problem for me. When you consider the cost-effective pricing of these connectors, for my $$$$ you get more than you pay for. I am satisfied and yes I will be ordering these again.

Great product, thank you.

This didn't work for me I ordered the wrong size don't like the fact that its all plastic but other than that it does what it's suppose to do and will keep it for other fittings.

The spring fitment on these feels so smooth and is much easier to use than other products I've used.No leaks and feels very solid.Would purchase these and other similar products again.

Used this to reduce the water filter inlet connection from original 5/16 OD to a 1/4 OD on a new water inlet valve for a Frigidaire fridge. Tight fit and no leaks. The only piece needed was a spare 1/4 tubing - to connect the male 5/16 OD water filter pipe to the female 1/4 OD inlet valve connection. So, make sure you have some spare tubing to connect to 2 female ends, after the reducer.

Used for Air Suspension repair on LR3. Used it to reduce a 1/4 line to a 3/16. Great price, looks and feels like a quality piece. First one I picked from the bag works well and is holding air without leaks. I’ve used similar items in the past for LR repair and they work well. No need to replace entire line, just cut worn piece and attach quick connect fitting.