The GROHE Retro-Fit™ Shower System transforms an existing shower head installation with concealed pressure balance valve into a luxurious shower system with a shower head that swivels to the perfect angle (the shower arm can be fixed or used as swivel) plus the added convenience of chooseing the perfect hand shower. Adding to the luxury experience is that both the head and hand showers can be operated simultaneously. The optional 6" height extension offers an extra solution for most application. Furthermore, the upgrade is quick and easy to install as there is no need to change the tiles or remove any of the original work. It immediately creates a fully customized shower experience.