Carmel Refillable Ballpoint Markers are perfect for all arts & crafts activities, including street art and mixed media projects. It is an excellent art tool for drawing on hard, flat, and non-porous surfaces. This marker works on oily, dry, or wet surfaces and comes in two forms; The Pump version has a pressable rubber ball at its base to control paint flow. The Bottle version consists of a squeezable bottle that applies paint through a press-activated metal ballpoint tip. Both Markers are best used with Carmel Paint Refill for Ballpoint Tip Paint Markers. Paint not included (sold separately).