Acrylic Marker Pen Nib Cotton Core Watercolor Pen Acrylic Replacement Nib Source Factory. 25 Years Manufacturing Experience: Specialist in fiber nibs with over two decades of industry expertise. 10+ Independent Invention Patents: Holds multiple patents ensuring unique technology and innovation. Customizable Nib Shapes: Offers round, R-shaped, flat, slant, and axe nibs with flexible customization. High Production Capacity: Average daily output of 5 million units with spot first shipment capability. OEM and ODM Services: Accepts customization from samples and designs with professional R&D support. Resistant to Solvents: Synthetic fiber material resists organic solvents without physical or chemical reaction. Smooth Writing Performance: Maintains consistent line width for a long duration with easy drying ink. Wide Material Selection: Nibs made from polyester, nylon, acrylic, and plastic based on specific needs.