De or het rolsteiger?

The correct Dutch article is:

de rolsteiger

How to use rolsteiger

the rolsteigerde rolsteiger
this rolsteigerdeze rolsteiger
that rolsteigerdie rolsteiger
our rolsteigeronze rolsteiger
your rolsteigerjouw rolsteiger
every rolsteigerelke rolsteiger
which rolsteiger?welke rolsteiger?
a big rolsteiger / the big rolsteigereen grote rolsteiger, de grote rolsteiger