Pilot BLS-G2-5 Gel Ink 0.5 mm Refill

Pilot Gel Ink Refill with a 0.5 mm tip, exists in three different colors and fits amongst others for Pilot-pens models: G-2, B2P Gel, G-Knock, G2 Retractable, G-2ex. The ink in the black and the blue refill is only document proof in ISO 27668-2.