Just to clarify, this is not exhaustively true, since KIN does produce at least 0.7 and 0.9 F leads.
But for the majority of 0.7, 0.9 and 1.3, as well as the entirety of 0.3 and 0.4, while leads as hard as (at least) 2H, as soft as 4B, and every non-F hardness in between are widely available, no one seems to offer leads in F.
(In contrast, everyone offers 0.5 F leads which makes me even more confused.)
Is F in those diameters simply too niche or is there something I’m missing?
