Perrin & Rowe Holborn 1/2" Therm & Pressure Balance Trim With 5 Functions (Share) U.THB45W1LSPerrin & Rowe Holborn 1 2 Therm & Pressure Balance Trim With 5 Functions (Share) U. THB45W1LS Thermostatic and pressure balance shower trim designed to control up to five shower functions with shared operation. Features Combines thermostatic and pressure balance technologies Set it and forget it temperature memory Supports up to 5 functions, allowing 3 independent functions with 2 running at the same time No need to plumb a separate shut off or