Ceramic cartridge: the heart of a faucet. A cartridge combines hot and cold water inside the faucet and regulates the flow. A Valve cartridges looks like a car engine, it should run smoothly and continuously. How to choose a ceramic cartridge: You need to measure the outer cylinder diameter of the valve ceramic cartridge at water. The diameter of the commonly used ceramic cartridge is generally 35 mm. It is recommended to buy two pieces at the same time. In the case, we can check the quality or check whether the ceramic cartridge matches the faucet. How to install: First, your ceramic cartridge must be compatible with the faucet. Then make sure the ceramic cartridge locating pin is in place (must be installed in the hole) and finally make sure you have tightened the copper cover of the ceramic cartridge. Water saving: If you have a leaky faucet, this replacement ceramic cartridge might be right for you. Ceramic cartridge type can prevent water leakage and save water. Durability: Made of quality PP plastic and ceramic sheet, practical and durable. This is a 35mm quarter-turn filter cartridge disc cartridge. 35mm mixer tap cartridge. It is practical replacement ceramic disc cartridge, made of quality PP plastic material and ceramic sheet, practical and durable. Can prevent water leakage and save water. Specifications: Condition:; brand new Main Material: PP Plastic Type: 35mm Type 35mm Size: Approx. 3.5cm Dia.x 5.8cm / 1.3" Dia.x 2.2 Main Color: Blue ceramic cartridge You need to measure the outer cylinder diameter of the water valve ceramic cartridge. The diameter of the commonly used ceramic cartridge is generally 35 mm. It is recommended to buy two pieces at the same time. In the case, we can check the quality or check whether the ceramic cartridge matches the faucet. 35mm mixer cartridge Specifications: Service life : 500,000 times Package includes: 1 x Ceramic Disc Cartridge