High Pressure Grease Swivel Installed between the delivery hose and grease control Valve, swivels allow easy handling of control valves and prevents the high pressure hose from kinking. Heavy duty steel construction with ball bearing for smooth operation and free unrestricted movement. Swiveling joints are hardened for durability & wear resistance. Max Working Pressure: 6000psi. Thread spec: 1/4" NPT (F), 1/4" NPT (m).