Repair or replacement of commercial shower components, rather than replacement of the entire unit, saves money and resources. Designed to control temperature fluctuations regardless of the pressure on hot and/or cold supply lines, Zurn's pressure balancing cartridge (Part no. RK7300-CART-3P) is made for Temp-Gard III shower valves. Temp-Gard pressure-balancing valves maintain a consistent water temperature. Zurn replacement parts are manufactured to provide long-term durability for commercial showering applications. When you need a replacement part for repair or maintenance of a tub or shower valve, trust Zurn for genuine, reliable parts. Color: blue. Material: Plastic.