Decisive for later use is the right nib width that fits the writing habits of the gift recipient; otherwise the fountain pen remains unused. Before purchase, an inconspicuous test with other fountain pens is therefore recommended to determine the preferred line thickness. When buying from an established Montblanc dealer, the nib can typically be exchanged within 14 days; on eBay this safety net is not given, which is why caution is advised with private sellers and especially with providers with few ratings.