High-quality brass: the air compressor check valve is made of high-quality brass material, which is characterized by high strength and durability. THREE THREAD CONNECTOR (THREAD CONNECTOR): One threaded connection is used to connect pipes and the other threaded connection is for compressed air tank and compressor piston pump. Male thread 90 degrees: this check valve has an external thread of 90 degrees and the valve is used for the air compressor. EASY INSTALLATION The air compressor check valve is easy to install with the threaded connections. Large replacement: the brass valve is used as an excellent replacement for the old or defective check valve of your compressor., Manufacturer: Hilitand