What are these black specks/ brown stuff when wiping down my castiron(07)

What are these black specks/ brown stuff when wiping down my castiron(07)


Image gallery: Brown Specks When I Wipe

What Does It Mean When You Wipe And Brown Stuff Comes Out at Travis Specks on my white couch that are only visible once wiped off? My white Call for help black specks when I wipe and trouble issues & indigestion Black specks when I wipe? Anyone have an idea r/medical Blue eyes with brown specks in them r/eyes Is plastic pipe corrosion a thing? Cleaning under the kitchen sink What Does It Mean When You Wipe And Brown Stuff Comes Out at Travis What are these black specks/ brown stuff when wiping down my castiron