Line-width variation can be also be achieved by adding Flex, which can be done with any size tipping point, though not with every brand of nib - see our FAQ on nibs suitable for flex for more details. Some pens, such as the Namiki Falcon and Metal Falcon, come standard with Soft nibs that are already semi-flexible. Any Nakaya pen can also be fitted with a stock Fine Soft or Soft Medium nib as well. Many experienced users have us add flex to these already semi-flexible nibs to achieve the most flexibility possible