What should my door check look like?

["Henry Morrison" <dos_gusanos@msn.com>]

I know where my door checks are, but what should they look like?  I know the 
star washer in the center of them is black plated,  is the rest of the gizmo 
nickel or Zinc Plated?...............Kindest regards to door check 
enthusiasts every where..........Henry Morrison