Uniball ZENTO Signature Model Metallic Black UBZH05M.24 Signature Model (UB-ZH) features a magnetic cap Ball diameter: 0.5mm Ink color: Black Body color: Metallic Black Uniball ZENTO is a smooth water-based ballpoint pen equipped with the newly developed ZENTO ink. It achieves a stress-free, smooth writing feel. The Signature Model features a magnetic cap. It can be removed from the pen body with a click. Ink color: Black. Tip size: 0.5mm. Refill: UBR-Z-05. Size: Length = 120mm Width = 14mm Thickness = 13mm