The Montana EMPTY Marker 15mm comes with a special optimized valve system. The Marker is a refillable empty body, suitable for all Montana inks and paints with a special pump system for optimum flow control. The marker offers replaceable tips as well as mixing balls. Use for the perfect combination DYE INK Refill Strong Black 200ml! Delivered as empty Marker. Montana EMPTY Markers are available as 8mm/ 2mm round, 10mm/ 3mm chisel, 15mm standard and 10mm crusher. Highest quality manufacturing