e following is a detailed of the product 1) Product name: Pressure tank rubber liner (2) Volume: 19L To 24L; This volume refers to the volume of the pressure tank, not the volume of this product. (3) After replacing the new bladder, you need to add a certain air pressure to the top of the pressure tank to use it. If it is used without inflation, the water pressure may rupture the product. (4) This product can keep the water pressure stable in the pressure tank, can reduce the frequent start and stop of the water pump, and stabilize the service life of the water pump. (5) This product can be used in diaphragm bladder tanks, as the bladder of pressure tanks. Both horizontal and vertical tanks can be used. The following is a reference for pressure tank dimensions When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don't hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it