STÆDTLER Mars micro 775 0.3/0.5/0.7/0.9 mm

Here! It’s more or less the same price but definitely better. I use the 0.7 mm version a lot myself.

https://www.amazon.com/Staedtler-Mechanical-Pencil0-7mm-refills-77507BK/dp/B005D5ZP8E/ref=mp_s_a_1_2?dchild=1&keywords=STAEDTLER+mars+micro&qid=1631858671&sr=8-2