Great Quality & Value: Our high quality compatible 1222 replacement cartridge works perfectly for shower faucets. Essential Values creates a great product at an incredible price. .Improves Water Flow: Our Posi Temp cartridge provides unrestricted water flow and prevents unwanted leaks. Our quality construction keeps your shower running smoothly and efficiently. .Dng : Made of brass and extra durable plastic, the Essential Values shower valve cartridge is designed to keep your fixture operating at peak performance. Compatible with the 1222 cartridge design. .Easy to Install: With our shower cartridge replacement, there's no need to replace your entire faucet. Simply replace your old shower cartridge with a 1222 cartridge in a few easy steps. Follow our simple instructions or customer for support! .Perfect Fit: Our Posi temp 1222 cartridges measure 4" x 1" and are custom designed to fit your shower.