Rozin Chrome Finish One-way Mixer Valve 8-inch Rainfall Shower Head Wall Mounted

Product description says it includes adapters for plumbing connections. No adapters included. Without adapters the stock fitting type/size is "G 1/2" this is NOT compatible with US standard NPT fittings!

I bought this shower faucet for my remodeled bathroom and when I went to install the Shower head extension arm noticed that it was rusted