Cleaning pump: The elastic rubber suction cup has a smooth and soft edge that will not damage the toilet or sink. The suction cup relief valve is based on the vacuum principle, which is easy to use and easy on the pipeline. Working Principle: Suck the air into the clogged pipes to create a strong air pressure difference, the water vigorously whips the clogged things to achieve the purpose of dredging. Two Types of Suction Cups: The package includes two interchangeable suction cups. The large suction cup is 5.9 inches in diameter, and the small suction cup is 2.6 inches in diameter. Suitable for toilets, bathtubs, showers, sinks, and other drainage devices. The large suction cup is suitable for bathroom drains and toilets. The small suction cup is suitable for bathroom and kitchen sinks. Improved Design: The drain pump handle is ergonomically designed. Therefore, you have the best grip and power transfer during use. More energy can be saved when draining the pipeline. High Quality: