Made with synthetic bristles and sturdy handle, ensuring long term durability and stability for frequent or occasional use in art project Designed with comfortable, hand friendly grip to reduce fatigue during extended use, letting you enjoy and creative painting and doolding without discomfort Simply rinse with water or mild cleaner to remove residues from the pen tip and interior, keeping brushes ready for immediate reuse in your next masterpiece Perfect for doodling, painting, furniture decorating, craft, card making, and repairs on surfaces like paper, fabric, metal, stone, rock, ceramics glass and wood, offering creative possibilities for artists and hobbyists This empty acrylic paint pen set features unique clear pen rod and refillable structure, allowing easy filling with various acrylic paints, watercolor inks, or mediums for precisely flowing control during artistic creation and touching up