This faucet cartridge replacement is designed specifically for 4 in. hand sink faucets, working for both kitchen and bathroom fixtures while not being compatible with 8 in. faucet models. Made from high-quality brass, it effectively eliminates leaks to provide a drip-free, water-efficient solution for your daily faucet needs. Its handle design enables smooth rotation for effortless control, letting you adjust hot water by turning counterclockwise and cold water clockwise to reduce wear and extend the part’s longevity. Installation is hassle-free, so you can upgrade your faucet’s functionality without hiring a professional plumber. It also serves well in a range of spaces, from commercial kitchens and bars to laundry rooms, fitting both residential and professional use cases seamlessly.