Pressure Balance Cartridge Replacement for RK7300-CART-3P Specifications: Color: Blue Model: Replacement for RK7300-CART-3P Material: Plastic, Metal Dimension: Height: 3.1in (78mm). Width: 1.57in (40mm) Features: Fixing your leaking tub/shower faucet with this replacement pressure balance cartridge. It will save water. Keeps water at a consistent temperature despite changes in pressure to the supply lines for user comfort and safety. Compatible with Temp-Gard III shower valves Compatible with Z-7300 Zurn Temp-Gard III Faucets Package includes: 1 x shower faucet cartridge replacement for RK7300-CART-3P