De or het bestekking?

The correct Dutch article is:

de bestekking

Rule Words ending in -ing: almost always de. See the rule

This word is not in the word lists we use to double-check answers.

How to use bestekking

the bestekkingde bestekking
this bestekkingdeze bestekking
that bestekkingdie bestekking
our bestekkingonze bestekking
your bestekkingjouw bestekking
every bestekkingelke bestekking
which bestekking?welke bestekking?
a big bestekking / the big bestekkingeen grote bestekking, de grote bestekking