Enhance your air compressor's performance with this durable check valve, designed for seamless integration into piston-type and -free systems. Its non-return mechanism ensures stable airflow, while the threaded design simplifies installation. Perfect for replacing worn-out parts, this valve helps users achieve consistent and efficient operation in pneumatic applications. Features -Color:Golden -Material:Copper -Size:4.00X3.80X3.50cm/1.57X1.49X1.38in -Reliable copper check valve: made with copper, this valve ensures effective prevention of gas backflow, safeguarding your compressor's functionality - -free piston system: the -free design provides clean air output, making it ideal for industries requiring high air purity, such as food production -Energy-efficient direct drive: drive design enhances efficiency, making it suitable for quick and reliable inflation tasks in various settings -Space-saving: its compact and lightweight design allows for transport and storage, perfect for professionals on the move -Quiet performance: designed with noise reduction technology, this valve ensures quieter operation, ideal for use in noise-sensitive environments Package list: 2 compressor check valves