UNI Uniball Signo GP RT1 Retractable Gel Pen UMN-155N-05, 0.5mm (Green)

a retractable gel pen known for its smooth, low-friction writing thanks to an "edgeless" tip, delivering vibrant, archival, waterproof, and fade-resistant pigment ink for lasting color.
It features a sleek barrel with a comfortable rubber grip and an integrated pocket clip