オートOHTO Ceramic 0.5mm Ballpoint Pen Refil, Black (C305-Black)

I have a korean micro ag ceramic pen - standard refill 0.5. the cartridge says permanent ink jg #91001. will this fit in my pen? a gift from a teacher

I have a ceramic roller refill c-300, will the c-305 work as a replacement? What's the difference between 300 and 305?

Does this fit the liberty pen? my insert looks the same, and says c-305 0.6, but says "6c" where the photo of this product says "5l". odd. the liberty

Would this work for micro ceramic roller ball pens?