The Pentel Oh! Gel K497B gel pen creates clean, medium lines with its acid-free, permanent gel ink for a smooth writing experience. It features a crystal-clear, diamond-cut top click for added appeal and a soft, latex-free grip for extended writing comfort. The extra-large, metal clip allows for easy attachment to pockets and notebooks. This gel pen is also refillable with Pentel KFRS7 refills.