Cartridge for Faucets: NBF-W04 High-pressure ceramic valve 20 teeth stem (M4-12) Thread size G1/2" Rubber O-ring Thread M20x1,5 Longevity and trouble-free use Limited lifetime warranty Product Description: If a handle is the muscle of a faucet, then a cartridge is the heart. Every time you turn it on, off, or adjust your water to the perfect temperature, it’s the valve, that’s doing all the work. The first single-control hot/cold-water mixing cartridge was invente