Brause 16500B - Pack of 3 Bandzug calligraphy nibs (1.5 mm, 2.5 mm and 4 mm)

I was looking for a nib of 3mm and I bought this pack thinking that the middle one was the 3mm size (quite standard).I couldn't see the description or specs of the size of each nib anywhere so just to add more information these are the 3 different sizes:-1,5mm-2,5mm-4mmEverything came in good conditions.