• Best For: Hydro-Force GEKKO SX-7 AR51G encapsulation head owners needing to renew a worn inner shell and brush assembly instead of replacing the whole head.
• Highlight: A direct-fit inner shell and brush combo for the AR51G head, restoring surface contact without buying a full new Hydro-Force GEKKO unit.
• Expert Note: Matches the Hydro-Force GEKKO SX-7 AR51G head only — confirm your head model before ordering, since encapsulation brush heads vary by series.