The Brizo Siderna Collection combines geometric designs with flowing curves and squared edges. Siderna captures the merging of all these concepts and creates products that are very appealing. This RP71650BL 15-1/2" Black Shower Arm is a universal Shower Arm designed to fit the Siderna Collections Shower Sets. The Shower Arm is covered under Brizo's limited lifetime warranty. The Matte Black finish also includes a superior finishing process that is covered under lifetime warranty.