This check valve is a good solution for preventing back chemical and systems. Made from durable copper, this valve is built to last and withstand high temperatures. Can be used for standardized connections, installation is quick and easy, requiring no tools. Available in a range of sizes, this valve is suitable for a variety of liquid and gas media. Features -Color:Golden -Material:Copper -Size:8.20X4.00X4.00cm/3.22X1.57X1.57in -Note: Suitable for pipelines with of 20mm/0.78in. -This product can accommodate various piping requirements. With its versatile design, it is a good accessory. -The check valve is designed to prevent back-flow and ensure smooth . -It is made of copper material that is durable, making it ideal for use in chemical and industrial settings. -The valve is easy to install and maintain, and its compact design allows for easy integration into existing piping systems. - With the one-way design, it can effectively prevent liquid backflow, very practical. Package list: 4 x Check Valve with Filter