6 Pack - Schmidt Easy FLOW 9000-3 Black Ink & 3 Blue Ink - Medium Point

Do they fit in caran d' ache 849 models?please advice. Thank you in advance

Are these authentic Schmidt EasyFlow 9000, or is the seller selling counterfeit or old cartrdiges with dried ink as some reviewers have written?

Will these fit the tactile turn mini and the refyne EP1??

Is this the refill for the Rotring 800 ballpoint pen?