The Grohe 27708000 is a wall union from the Allure Brilliant collection that brings a contemporary charm and great design versatility to your bathroom and home. It is designed to mount on the wall and create support for other shower accessories. This union has 1/2" NPT male threads, making it easy to find parts that will fit. You will love its clean and abiding StarLight chrome finish which is easy to match with the other bathroom decor. The Starlight finish is a deep, even layered chrome surface that creates a luminous and mirror-like sheen.