This heavy-duty oily marker pen is specially designed for logistics, packaging, and daily marking work. It features a large capacity design that supports repeated ink refilling, ensuring long-lasting use without frequent replacement. The thick, sturdy nib delivers bold and clear lines, while the quick-drying ink prevents smudging and fading, making it perfect for writing on cartons, plastic, metal, glass, and other surfaces. Available in blue-black, it offers high visibility and strong coverage, making your labels and marks clear and long-lasting. Ideal for warehouses, courier services, offices, and outdoor marking applications.