Pentel EnerGel Permanent Security Pen Blue 0.7mm Pack of 12 BLP77-CX Filled with waterproof and light-fast permanent ink, this fine point retractable liquid gel pen from Pentel is ideal for use on cheques, contracts and archival documents. The super smooth, permanent ink is also quick drying, helping to prevent smudges on official documentation. The fine 0.7mm tip writes a 0.35mm line width. This pack contains 12 blue pens.