Buying a pen block is not necessarily intended to replace a damaged pen, but can also be used, in my case, to have two different pen widths (for example thin and wide, etc.) without buying an additional pen to always get a nice write on different media according to the absorbency of the paper, or to simply change according to your fancy.
I myself have acquired this block "large size" to complete my fountain pen "medium": replacement is quick and easy and gives me any satisfaction. A recommendation for lovers of pen writing.