High-quality Materials:The faucet spool is made of high-quality brass and ceramic, which is durable and rust-free for long-term use 20-gear Universal Valve Core: There are 20 gears on the top of the valve core, the outer diameter is 7.5mm, the inner diameter is 4mm, the total length is 51mm. It is the most common size of the tap cartridge valve. Please read the size picture carefully before buying. We recommend that you take off the old faucet. To compare sizes, ensure compatibility Good Sealing: This tap valve replacement has a black rubber retaining washer that is easy to use, seals the faucet well, prevents the faucet from leaking, and saves the need to change the faucet again, making your life easier Red & Blue Logo, Easy to Use: The red and blue O-rings on the bottom of the spool make it easy to distinguish and make installation easier. Red is rotated clockwise to open the faucet, counterclockwise to close, and blue is opposite to red. Please assemble according to your faucet characteristics during installation Widely Used: The set contains two ceramic tap valve (1 * blue & 1 * red) with 2 4mm screws for faucets in bathrooms, kitchens, etc. Can be used for single or double hot and cold water taps Product Are you still worried about leaking water from the faucet? faucet valve --- refuse to leak, make your bathroom and kitchen more tidy and dry. 20-gear Universal Valve Core There are 20 gears on the top of the faucet spool. The outer diameter is 7.5mm, the inner diameter is 4mm, and the total length is 51mm. Please read the size picture carefully before purchasing. We recommend that you remove the old faucet valves and measure it before comparing it to the product image. High-quality Brass and Ceramic The spool is made of high-quality brass and ceramic, which is durable and rust-free for long-term use. Equipped with 2 4mm screws for faucets in bathrooms, kitchens, etc. Can be used for single or double hot and cold water taps Good Sealing The faucet valves has a fixed washer that is easy to use, seals the faucet well, prevents the faucet from leaking, and saves the need to change the faucet again, saving time and effort, saving water and keeping your bathroom from getting wet. Red & Blue Logo, Easy to Use The faucet valves has a fixed washer that is easy to use, seals the faucet well, prevents the faucet from leaking, and saves the need to change the faucet again, saving time and effort, saving water and keeping your bathroom from getting wet. Specification Material: Brass+Ceramic Weight:100 Gram Packing Includes: 1* faucet Valve 2 * 4mm Screws Note 1. Please check the size carefully before ordering to ensure compatibility with your model 2. Make sure there are 20 gears on the top of the spline spool 3. Compare the diameter of the threaded head to 7.5 mm 4. Make sure it has threaded or no threaded. 5. Compare the height of the faucet valve 6. Determine if the opening direction is clockwise or counterclockwise