Features 1、5 SETS FITTINGS: Including 5pcs quick connectors and 5pcs locks, sufficient quantity for easy connection and replacement. 2、PLASTIC STEEL: Made of excellent plastic steel material, has good rigidity, aging and corrosion resistance, and not easy to rust. 3、TIGHT THREAD: These self locking air fittings have tight thread structure that is clear and wear resistant and not prone to cracking. 4、STEEL BALLS: Built in high hardness steel balls, with tight and smooth buckle, and the operation is convenient and reliable. 5、STANDARD SIZE: Maximum pressure resistance up to 20kgf/cm², wide range of applications, suitable for standard inner diameter hoses. Specification Item Type: Quick Connector Material: Plastic Steel Maximum Pressure Resistance: 20kgf/cm² Working Pressure: 0~0.92kgf/cm² Operating Temperature: -35℃~60℃ Package List 5 x Connectors 5 x Locks