The Pentel EnerGel Permanent is a retractable gel ink pen with a 0.7mm tip, producing a 0.35mm line width. It features waterproof, light-proof, and fade-proof ink, making it ideal for official documents, contracts, and archival purposes. The ink is ultra-smooth, quick-drying, and smudge-proof, which is beneficial for left-handed writers. This pen is certified to DIN ISO 2766 8-2:1999 and constructed with 54% recycled materials. It also includes a strong metal pocket clip. Refills are available using Pentel EnerGel Permanent LRP refills.