In stock. Ink Refill for Uni-ball ONE 0.5 mm 29 kr Color Black Blue Black Add to basket Item number: 402090 Brand: Uniball Refill for Uniball ONE pens 0.5 mmFast drying, waterproof gel ink. The ink does not feather, it produces crisp, sharp lines.Ink: Waterproof gel ink. Archival quality.Fits: Uniball ONE, ball size 0.5 mm