Genuine Hi-MARKR™ refills for your TEC Accessories Hi-MARKR™ highlighter/marker. All refills are quick drying, non-toxic and acid free. These are a water-based formulation which is environmentally friendly, less likely to dry out as compared to alcohol based pigments, and offer easy clean up. The black ink refill utilizes a semi-permanent ink, which produces very good opacity. The highlighter refills are non-bleed, vibrant colors with an excellent translucent quality. NOTE: Not all colors shown are available at this time. We will release new colors as they become available. Hi-MARKR™ Refill Features: 100% Hi-MARKR™ compatible 3.4mm port Quick drying Acid-free and non-toxic Easy clean up Capacity: Approximately 5ml of ink/pigment Similar refills from other manufacturers may be compatible with the Hi-MARKR™, providing that they conform to the mechanical dimensions shown in the associated diagram. User-friendly Installation: Pull the used cartridge from the rear of the tip module, then insert the new refill into the bayonet and push firmly into place. After installing back into the Hi-MARKR, you can gently shake the pen to speed up the pigment flow. What you get: (5) Refills of the same color in each pack