Blue ink for the sign-off column, the margin notes, the 'initial here' request that lands on your desk at 3:45pm. The Uni-ball Signo RT 0.5mm in blue writes clean from the first stroke — water-based gel ink that doesn't smudge before you've turned the page. Rubber grip so your hand holds up through a full set of minutes. Twin ball ink control means pen one and pen twelve feel the same. Twelve in the box. No more sharing one sad pen across the whole office
| brand | UNI-BALL |
| series | Signo RT |
| line_width_mm | 0.5 |
| ink_colour | Blue |
| ink_type | Water-based gel |
| grip | Ergonomic rubber |
| ink_control | Twin ball |
| pack_size | Box of 12 |
| category | Office Supplies |
| subcategory | Writing & Correction |
