The Keenware KSA-005 Brass Shower Wall Elbow Outlet With Handset Holder For Concealed Shower Systems Is Available With A Standard ½" BSP Outlet For All Standard Shower Hoses. It Also Has A 42mm ½" Inlet Thread With Locking Nuts For The Reverse Od Board & Tiles. The 45mm Backplate Is Also Large Enough To Give A Great Sleek Looking Design & Is Big Enough To Cover That Inlet Hole. The Keenware KSA-005 Brass Shower Wall Elbow Outlet With Handset Holder For Concealed Shower Systems Is Available With A Standard ½" BSP Outlet For All Standard Shower Hoses. It Also Has A 42mm ½" Inlet Thread With Locking Nuts For The Reverse Od Board & Tiles. The 45mm Backplate Is Also Large Enough To Give A Great Sleek Looking Design & Is Big Enough To Cover That Inlet Hole. Keenware KSA-005 Round Brass Shower Wall Elbow Outlet Built In Handset Holder High Shine Chrome Plated Finish Standard ½"BSP Outlet, Compatible with All Standard Shower Hoses 42mm ½" Inlet Thread With Locking Nuts48mm Square Backplate