Bulk Value Pack & Organization Efficiency: Get 6 packs of 50 sheets each (300 total) blue ruled index cards. Thick paper resists bleeding and curling, ideal for highlighters, pens, and markers High-Density Paper Cardstock: Ensures smudge-proof writing. Acid-free 160gsm paper prevents ink bleed-through while providing satisfying tactile feedback. Perfect for fountain pens,gel pens & markers Multi-Purpose Flash Cards: Adaptable for study aids, quick jotting, or visual organization. These 3x5 index cards simplify information retention across work, education, and personal projects Smooth Writing Surface: With subtle guidelines silky-coated surface enables effortless pen gliding. Perfect for students, bullet journalists & meeting note-takers Effortless Organization: Optimized for creating flashcards, study notes, project planning, etc. Our index cards help categorize subjects or business projects with intuitive visual system