Visible Ink Supply You Are Aware Of Remaining Ink Level Every Time. Twin Pipe Flow For Instant Start & Consistent Flow From Start Till End Replaceable Ink Cartridge System Ease Of Refilling. Economical. Enhance Product Life. Less Wastage. Eplaceable Tip You Not Need To Buy Marker Again & Again. Economical. Enhance Product Life Less Wastage. Pure Liquid Ink Smooth <> Writing Be Green Eco Friendly- Made From 71% Recycled Material Medium Bullet Tip 2.3Mm Width Of Stroke. Dense Writing Impression. Clearly Visible From Distance Ink Color: Red