Each marker is one size and can attach to each other with a connector ring so you can have two from the same color family on the same marker or any other combination that you prefer. Should you only want one you can purchase a handle and this can be used for any of your markers. Marker bodies are color-coded for quick nib identification. For example, the black body color identifies the brush marker, and the dark gray color identifies the chisel marker. The white marker body is limited to the OLO ZERO (colorless solution). All OLO nibs work with all OLO Replacement Ink Cartridges and half-markers.Marker bodies are color-coded for quick nib identification. For example, the black body color identifies the brush marker, and the dark gray color identifies the chisel marker. The white marker body is limited to the OLO ZERO (colorless solution). All OLO nibs work with all OLO Replacement Ink Cartridges and half-markers.
