Medium Flex - Round Tip. This Hunt 513 EF is sometimes called a mapping nib. This is a large nib with medium flex which can write on a variety of papers because of the bowl point. It can accommodate paper with more tooth and does admirably on surfaces that are not absolutely smooth. This is a great all round workhorse of a nib, highly recommended for those who are new to dip pens or pointed pen work. Fits standard pen holders. Price is for a single nib.