Solid brass body and stem. 20 teeth on the groove (top of the stem) for the handle, drilled with M4 drill bit. Thread size G 1/2" BSP. Clockwise (Blue) and counterclockwise (Red) to open the tap. Rubber O-ring at the bottom, with threaded collar. Suitable for basin taps in bathroom, kitchen, etc. Suitable for both cold and hot water. Materials: Made of brass and ceramic, sturdy and durable. Works perfectly, no more dripping faucets, can be used for a long time. Easy to use: The red faucet valve is turned clockwise to open the faucet, counterclockwise to close, and the blue cartridge is opposite the red one. Application: Suitable for cold and hot water, Fits most double handles, suitable for basin faucets in bathrooms, kitchens, etc. Delivery quantity: 2 pieces