Piston design fountain pen This pistonfilled fountain pen uses quality materials, a comfortable grip, and a visible ink window. It writes smoothly, is lightweight, and is suitable for students, children, adults, and beginners practicing calligraphy. Unique gradient colors Exquisite gradient color design with multiple bright metallic color options. Matching with colored inks is recommended. Ideal for scrapbooking, journaling, note taking, drawing, detailing, graffiti, writing, sketching, marking, art design, and illustration. Fine nib 0.5 mm fine nib. Sturdy metal pen clip and antislip grip provide secure handling and precise control. Delivers smooth, continuous ink flow. The long, wellbalanced body offers comfortable writing for business signing, art signatures, and Chinese character practice. Rotate to refill Upgraded pistonfilled ink cartridge, easily refilled by twisting the knob. Large ink storage capacity. Hollowout pen body with a transparent cartridge makes remaining ink easy to monitor. Use scenarios Daily writing and note taking in school or at work, journaling or scrapbooking, and detailed sketching or illustration. Calligraphy practice, Chinese character writing, or signature work for formal documents. Creative design projects, art drafting, or decorative lettering and outlining.