21 months development-time, exchangeable 60 mm Highflow-Tip, 8 ink-channels, 1 MASTERPIECE". Our biggest pumpmarker is absolutely record-breaking, not only judging by its numbers. Its patented Flowmaster™ pump-valve provides a constant ink-flow for quick applications on larger areas. The included Speedlow cocktail ink is nitrogen based and has a viscoplastic coating with a light copper luster (chemical black). It is also alcohol-based, permanent, high-covering, UV- and weather-resistant, quick-drying, abrasion-resistant and therefore perfect for indoor- and outdoor-use. Of course, it's refillable very easy with all of our inks and paints. But the best results youll get with the alcohol-based CoversAll and Speedflow refill cocktails