Grohe 35066001 Grohsafe Universal Pressure Balance Rough-In ValveThe GrohSafe Universal Pressure Balanced Rough In Valve features durable brass construction. The integrated handle limit stop, diaphragm cartridge and check valves provide ultimate user control. The ceramic cartridge technology of Silk Move offers silky smooth operation for fingertip control with a design that can accommodate multiple decorative trim options. Features: Includes Blue Core cartridge 265 comfort range Handle limit stop Check valves