Steel Tube Import Companies Denmark

I am in contact with one of teh companies listed in your site. Is there a way to check if its legit? need Square steel tubes 80x80x2 mm HDG

Mainly we import from China, but we are interested in finding a supplier in Turkiye instead. The dimansions are: 80x80x2x2100 mm 80x80x2x2400 mm 80x80x2x2700 mm 80x80x2x3000 mm HDG dipped surface zinc thickness 75 mu.