Designed specifically to meet the high standards of professional artists. The High Solid markers have great coverage. The HS 227 marker is not at all a Decocolor Marker. What makes this marker superior is it"s patented valve system and the One 4All paint. The new valve system was specifically designed for this marker, it ensures even and consistent flow to the nib. Another feature of this marker is the interchangeable nibs. REFILLABLE