De or het wagenladder?

The correct Dutch article is:

de wagenladder

How to use wagenladder

the wagenladderde wagenladder
this wagenladderdeze wagenladder
that wagenladderdie wagenladder
our wagenladderonze wagenladder
your wagenladderjouw wagenladder
every wagenladderelke wagenladder
which wagenladder?welke wagenladder?
a big wagenladder / the big wagenladdereen grote wagenladder, de grote wagenladder