Pen comes with black, red, blue, green, or violet ink.EnerGel RTX Liquid Gel Pen The EnerGel family of liquid gel pens offers a variety of choices from retractable to capped, fine point to bold, several barrel styles, and a wide selection of vibrant ink colors. With so many options, you're sure to find an EnerGel pen that matches your style. EnerGel RTX pens come with either black, red, blue, green, or violet ink. However, they can be refilled with any EnerGel refill available in a variety of other vibrant colors to match your mood and keep your writing instrument unique to you. Quick Drying Ink EnerGel ink dries super fast, which is why left-handed writers love EnerGel -- No Smears, No Smudges, No Globs. High-Tech Smoothness EnerGel liquid gel ink is a high performance ink technology that combines the best qualities of liquid and gel ink for a super smooth writing experience. Liquid ink characteristics provide an easy flowing ink supply, while gel ink characteristics include smoothness of writing, vibrant colors and fast-drying capability. Refillable Don't toss out your pens! Did you know that over 90% of EnerGel products are refillable? Why throw away your pen and contribute to landfills when you can replace your depleted ink cartridge with any size and/or color EnerGel refill. Help the environment while saving money! Be Bold . .. or Medium, or FineFine line widths are achieved with our 0.5mm needle tip pens Medium lines are achieved with our 0.7mm needle and 0.7mm metal tip pens Bold lines are achieved with our 1.0mm metal tip pens Recycology Pentel has been committed to protecting the environment for over 40 years. We developed the Pentel Recycology program to further our efforts to minimize our carbon footprint and help save the planet. Over 75% of our products use recycled content, including factory recycled materials and post-consumer waste. Become a "Recycologist" and together we can reduce our impact on the environment and build a better, cleaner future. Compare ProductsEnerGel AlloyEnerGel PearlEnerGel RTXEnerGel-XEnerGel NV Retractable???? Capped? Tip Size: 0.5mm (fine)??? Tip Size: 0.7mm (medium)????? Tip Size: 1.0mm (bold)?? Refillable???? Recycology????