... ,solid,bueatiful shape,easy to install,used for different machines Quick CouplingNylon 25mm ID,39mm OD1" ID,1-1/2" OD32mm ... " OD32mm ID,51mm OD1-1/4" ID,2" OD Threaded Quick Coupling Nylon 1-1/4"32mm2"51mm Steel 1-1 ... "51mmAll the size and thread type can made-to-order. Quick Connector