The MOLOTOW™ Empty Pump Markers are available in different sizes and can be filled with every kind of liquid paint. The Empty Pump Markers are equipped with the FLOWMASTER™ Pump-Valve for an active paint flow control and the patented capillary system (patent no. DE 197 30 454 IPC B43K 8/04 - 111EM, 211EM, 222EM, 223EM, 311EM, 711EM) that guarantees an even and controlled dye distribution. These markers show the best writing performance on almost every surface – indoor or outdoor. The mixing ball inside the markers makes sure that highly concentrated pigments are evenly distributed within the paint for optimal writing results. Therefore it is recommended to shake your marker well before use. The tips of the markers are exchangeable. The markers have an high density cap with a rolling stop.