The Delaune Brass Shower Wall Elbow Outlet For Concealed Shower Systems Is Available With A Standard ½" BSP Outlet For All Standard Shower Hoses. It Also Has A 50mm ½" Inlet Thread With Locking Nuts For The Reverse Of the Board & Tiles. The 45mm Backplate Is Also Large Enough To Give A Great Sleek Looking Design & Is Big Enough To Cover That Inlet Hole. DelauneRound Brass Shower Wall Elbow Outlet Quality Matt Black Finish Standard ½" BSP Outlet, Compatible with All Standard Shower Hoses 50mm ½" Inlet Thread With Locking Nuts 45mm Round Backplate