reading a eibach rear spring:

[jackdrinker]

Hey guy's,
I was cleaning parts today and took a look at the spring on my rear shock.
can someone please tell me what the rate is? the numbers do not match the eibach site.

ok, now it can go two ways:
992.c280.2a
or
992.0280.2a

and it also reads
42/96

Thanks,
Jonathan Daniel