Standard 1/4" NPT thread and 1/4" body, compatible with M or D type fittings, with a maximum working pressure of 300 PSI. Knurled sleeves provide a better grip for easy connection and disconnection, enhancing user experience. Made of solid and expensive brass material, ensuring durability, resistance, and oxidation resistance. Coupler's sleeve guard reduces the risk of accidental disconnection and protects the joint sleeve., Manufacturer: Uxsjakjsd