I love the flex on these nibs, this is my go to nib for great line variation, it makes a fairly narrow line with little pressure but becomes very thick as pressure is added!I highly recommend this nib.

Great semi flex nib for beginners' pointed pen calligraphy.

From a very fine line out to around 3mm, the flex is magnificent and smooth

, ink is adequate, WONDERFUL flex

A little stiffer than my speedball flex

Good nibs once you get the hang of them-- with enough finesse, they can make a $5 pen into a fine art calligraphic flex!

to fit this nib, and am getting an unreal vintage flex

Great flex

Work well with Jinhao x750 fountain pen to produce a nice flex pen.