http://www.arevolt.com German Montana Acrylic Graffiti Markers are some of the best graffiti markers out there. They have a half inch nib and they can be refilled as well as have the nib replaced. Also, they don't have an awful smell and can be used indoors or outdoors. Plus, if you like the paint you can use it in an airbrush! Win Win! Buy yours now from Proletariat!