Monsoon G1/4" to 3/8" ID, 1/2" OD Free Center Hardline Compression Fitting, Matte Black, 6-Pack

I just want to say straight away that these do not require any sort of glue. I Googled for a while and even read the one review on these here on Amazon... They are compression fittings... and they come with tons of seals. I even tested for 24 hours with the compression cap backed out from tight by a full turn.. still no leaks. I pair them with Monsoon's hardline tubing. There were no instructions so I knocked a start for that. There are tons of tutorials on youtube.Not sure why my img uploaded upside down..

They work fine and you DO NOT NEED GLUE! All things required are included in the product but there are no instructions. The O-rings in the center are used to help to seal and you must order the compressions correctly in order to tighten them correctly.