Help me identify my fork

[Jessy]

I just bought an envy thredless fork from my friend but its missing the ring that holds the black thing in place isnt there does anyone know what its called.

 

[Cole]

pics

 

[Bror Svensson]

probably a envy sob

I just bought an envy thredless fork from my friend but its missing the ring that holds the black thing in place isnt there does anyone know what its called.