De or het ruilcontract?

The correct Dutch article is:

het ruilcontract

How to use ruilcontract

the ruilcontracthet ruilcontract
this ruilcontractdit ruilcontract
that ruilcontractdat ruilcontract
our ruilcontractons ruilcontract
your ruilcontractjouw ruilcontract
every ruilcontractelk ruilcontract
which ruilcontract?welk ruilcontract?
a big ruilcontract / the big ruilcontracteen groot ruilcontract, het grote ruilcontract