Genuine Fox Air Cap. Select your cap from the 5 options.
Fox Shox 32mm /34mm Air Top Cap Blue
Fox Shock Air Valve Cap Black Aluminium - Genuine Part (also Fits Rockshox)
Fox Shock Air Valve Cap Red Aluminium Genuine OE Part
Fox Air Valve Black Cap Dust Cover 010-00-057 Genuine Parts
Fox Shock Air Valve Cap Black Alloy
Fox Shock Air Valve Cap Aluminium Genuine OE Part Red