1/2" Barbed Push Lock T-Fitting Adapter with 1/8-27 NPT Sensor Port, 304 Stainless Steel Fuel Line Pressure Adapter for 12.7mm ID Line, Clamps 2 PCS Included

Good quality

Works as designed , picture shows it clearly

Helped me to get the pressure correct on my carburetor

As expected and did the job I wanted them for. Not much else to say.

I like the quality fast shipping no issues

Works as described.

So I know you're not going to be able to manufacture a fitting that has true to size internal diameter for the size hose it's going in and actually be able to install the fitting, but this fitting is clearly undersized. It is a robust steel fitting so more could definitely be bored out of the ID amd it still be plenty strong enough. Measured against XDP's knockoff of a PureFlow AirDog/Vulcan fitting shows a pretty large difference in ID. Probably not going to be the end of the world for most applications, but if your system demand is on the edge of what a 1/2 system can supply, checking the internal diameter of your fittings is something to pay attention to and this fitting will cause a restriction. It is smaller internally than a 3/8" hose is.

The gauge is the best way to keep a watch on the fuel system.It made a huge difference for me in gas milage and the cost paid for it's self.