I'm a bit confused: Is the WMF vegetable steamer 16cm, steamer, cooking pot, stainless steel (item 8216839) the same as on the manufacturer's website wmf.com/en/daempfer-20-cm-mit-glasdeckel.html ? The one in Galaxus has a diameter of 16 cm, the one at WMF 20 cm. For me, these 4 cm are important. 20 cm would be ideal, 16 cm is too little. Is there a mistake in the description on the galxussite or are they two different products?