The Pilot Justus 95 features an innovative adjustable fine 14k gold nib that allows the user to make the writing point softer ("S", or soft/semi-flex) or more stiff ("H", or hard) simply by turning the tension adjuster at the top of the gripping section. The soft setting will allow for greater line-width variation, versus the hard which will write like a traditional stiff nib.
I found Iguana really friendly, helpful and efficient to both buy the pen and when I had a query - very quick to respond. The pen is gorgeous and I’m now using it every day.