Features 4Pcs in Total: This kit includes 2pcs 1/2 inch NPT threaded air coupler with 1/2 valve body, and 2pcs 1/2 NPT threaded air plug with 1/2 housing. High Flow Valve: This air connector is suitable for high flow air tools, and the 1/2 inch valve body provides higher air flow. Please ensure that the required thread size is 1/2 inch NPT thread. Reliable Work: This accessory set can be connected to accessories of the same type and size from other brands. 300PSI maximum working pressure, temperature up to 250 degrees Fahrenheit. Six Locking Balls: There are six locking balls in the connector that can securely fix the plug. The sleeve protection device helps to reduce the possibility of accidental disconnection. Durable Structure: Heat treated steel structure has high corrosion resistance and long service life. There is a thick coating to increase durability and reliability. Specification: Item Type: Air Hose Fitting Male and Female Connector Size: 1/2in NPT Application: Air hose quick connector.  Package List:4 x Air Hose Fitting Package List 4 x Air Hose Fitting