This Duotight push - in fitting is great for anyone working with gas or beverage systems. Whether you're a professional installer or a DIY enthusiast, it'll make your job easier. You can use it in bars, breweries, or even home setups. It has a 6.5 mm (1/4 in.) to 8 mm (5/16 in.) size, which is perfect for connecting different - sized tubing. And it's pressure - rated to 100 psi, so you can trust it to work well in various situations.