Great seal:Save you from leaks issues.The consistent threads make it bite in great plus the o-ring to ensure there is no leaking in the tubes.These will be solid for months,even on a rig you travel with internationally Preven wearing off:High quality nickel plated brass,that is what makes it rust proof.And you don’t have to worry there will be shiny painting flakes building up in one of your cooling tubes,which will jamed your waterblocks on GPU & CPU 360 degrees Rotate smoothly:Well built tube elbow thread on the swivel adapters.Threads in beautifully.The rotary action is smooth.Rotary makes them perfect for any loop build because they can spin for whatever angle you need Easy solution for build:If you looking for male to famale 90 degree rotary fitting that didn't break the bank,you will be pleasantly surprised by these.These fittings can also be use to replace all of the crusty leaked ones on your personal computer or extend your build to make the cooling system works better Hight Compatibility:These can really make routing hard tubing quite a bit easier.You can use them for your custom water loop build.These fittings are great for adding versatility to your connections. They swivel easily and feel solid