General description This Draper 1/4' Bore Vertex Air Line Coupling with Tailpiece (51414) is designed for use with standard adaptors. Its double action mechanism prevents accidental disconnection, making it particularly suitable for trailing hose applications. Technical specifications Maximum airflow rate: 1197 L/min (42 cfm) at 6.9 bar (100 psi) Maximum working pressure: 13.8 bar (200 psi)