Grohe 19457EN1 is part of the Concetto Faucet Collection. Concetto is designed with simple geometric shapes while providing for excellent ergonomics, the contemporary design is ideal for those with more modern taste is design. The Grohe 19457EN1 is a Pressure Balance Valve (PBV) Trim. Using a Single Lever Handle, you can control your shower with a single movement. This Valve has a Polished Nickel finish to set it apart from the traditional Chrome. its backed by a lifetime finish warranty.