Item Type: American quick connector Body: 1/4 inch manual coupler Thread: 1/4 inch internal thread NPT Material: Brass Product Diameter: Approx. 45mm / 1.77in Hole: Approx. 20mm / 0.79in Quick Interface: Approx. 16mm / 0.63in Rated pressure: 300psi Package List 1 x American Quick Connector 1As one of pneumatic tools, such air connector is suitable for air compressors, automotive industry and mechanical engineering for multiple uses. 2Made of brass material, pneumatic adapter can be sturdy and wear resistance, not easy to damage for high rated pressure. 3Quick connectors as one of air hose accessories can greatly reduce installation time, practical. 4After many inspections before leaving the factory, pneumatic adapter's quality is guaranteed, you can use it with confidence. 5This American quick connector is built to strict quality control standards, improved for more durability.