The Rainshower Ceiling Mount Shower Arm in Brushed Nickel is made from premium materials, this item offers great function and value for your home. This fixture is part of Grohe's decorative collection, so make sure to check out other styles of fixtures to accessorize your room. Solid brass construction Ceiling mount installation 1/2" NPT male thread Can be used with any shower head including rainshower jumbo (28 783) ASME A112.18.1/CSA B125.1 Key Features & Innovations StarLight Made to last surfaces ranging from precious matt to shiny like a diamond.