The BLS-G1 Gel Pen Refill in Black is a high-quality rollerball pen designed for precise and smooth writing. With a line width of 0.5 millimeters, this pen allows for fine and clear lines, making it ideal for notes, drawings, or creative work. The rollerball pen belongs to the black color group and offers an intense, even ink color suitable for various applications. The pen is refillable, making it an environmentally friendly choice as it does not need to be discarded after a single use. Made from durable plastic, the refill is both long-lasting and easy to handle. The package includes 12 pieces, ensuring long-term use. This rollerball pen is an excellent choice for students, professionals, and anyone who values high-quality writing materials.