Make a bold "go green" statement with these super markers made from 92% recycled content and are refillable so you won"t create additional waste! Pure liquid ink is industrial strength but meant for everyday use and delivers writing that will always be bold and dark. Visible ink supply. Meets ISO14001 and 14021 Standards. Global Product Type: Markers-Permanent; Marker Type: Permanent; Assortment: N/A; Color(s): Blue.