Material: The faucet valve core is made of solid brass and ceramic, which is resistant to high temperature, wear-resistant, has good sealing and is not easy to age. Quantity: The package includes 2 pieces of 1/4 to 1/4 slot 20 wire connectors. There is a clockwise opening valve (blue) and a counterclockwise opening valve (red). Height: 50mm. Bottom diameter: 18mm. Smart design: The faucet cartridge has 20 teeth on the grooves and is drilled and threaded to fit a 4mm screw, with a threaded collar for the rubber O-ring on the bottom. Precautions before installation: Clean the inside of the faucet and make sure the valve seat is clean and free of debris. We include a matching screw for each faucet, so you can repair your faucet by simply unscrewing the old screw that needs replacing and screwing in the new one. Scope of application: Suitable for hot and cold water replacement faucets in sink faucets, bathrooms, kitchens, etc. Before purchasing, please carefully check the dimensions in