we refer to
we saw

your advertisment for (products) in

the (newspaper) of (date)
the latest issue of (magazine)

We understand/note/lern

from your

brochure/sales literature/web site

that you

produce/export/have a wide range of

(products)

Your campaby has been recommended by/ We have obtained your adress from

a

buisness partner/ costumer

We are

a

leading/major/young/

German/international

importer/wholesaler/manufacturer