Our one-piece Double Ceramic pressure balance cartridges contain both ceramic mixing discs and a ceramic pressure balancing spool. The ceramic discs provide a smooth mix of hot and cold water for a wider range of shower temperatures and drip-free performance.  The ceramic pressure balancing spool reacts quickly to pressure changes to protect against accidental scalding, providing a safer shower experience. The ceramic material is resistant to mineral buildup and unaffected by harsh water conditions, ensuring lasting durability.