Grohe 19822000 Authentic 2-Handle GrohFlex Universal Rough-In Box Single Function Thermostaticbr Click below to buy on Amazon: For use with Groh Flex universal rough-in box 35026000 br 66 GPM at 45 psi br Ideal for secondary baths br Includes control module and trim br For use with shower or tubshower with diverter spout