With the System1 Designs team having many years in the field, we have used our fair share of plumbing components over time and we are confident we found the best product to fit the bill. These fittings are made out of high quality material, precision machined, and anodized PROPERLY. This means you don't have to worry about them breaking, leaking, or fading over the years. They are HIGHLY resistant to scratching, which is one of our biggest concerns beyond how they perform.  Here are some more added benefits: One-piece design, other manufacturer braze their tubes to the fitting head itself Internal O-rings in the socket end Wider wrench area than most fittings on the market Optimized socket entry, to allow for easier installation on the hose Push Lock : Reusable Push Lock : Polymer stop cap Push Lock : Tapered nipple for ease of installation Available in ALL BLACK only, no time for fancy colors ;). System1 Designs fittings can be used for all types of fuel, oil, coolant, hydraulic fluid, and pressurized air. They meet and exceed all S.A.E. standards and NHRA standards.