The G-301 Retractable Gel Pen refill features easy-glide ink performance providing a smooth and skip-free writing experience. Combining the smooth glide performance of water-based ink with the lasting results of our acid free, archival quality check safe ink, the G-301 creates a free flowing and colorful writing experience. The G-301 gel pen refill is the finest choice for your everyday writing needs. Available in bold and highly pigmented business colors.