Uxcell G1-1/4 x G3/4 Female Thread 33mm Brass Pipe Fitting Hex Coupling

Uxcell G1-1/4 x G3/4 Female Thread 33mm Long Brass Hex Water Meter Pipe Fitting Coupling Connector AdapterWhat is this? The coupling connects 2 threaded pipes with different diameters with a hexagonal head for an increased bearing surface when adjusting the fitting with a wrench tool. Are there any advantages of the product? Brass material features corrosion...