Molotow's iconic Twin Dual markers feature a durable body equipped with both a 1.5mm Twin Round Nib and 4mm round nib, making it the perfect choice for the artist on the go! Use the 127 side (1.5mm) for crisp outlines and definition and the 227 for bold lettering and filling. Both nibs are replaceable, body is refillable with Molotow One4All HS Acrylic Paint or the high-flow ink of your choosing.