Durable permanent marker, long-lasting color. Won´t Dry Out when cap is left off for 2 weeks on classic colors: Blue, Black, Red and Green. Low odor, vivid ink. Acid-Free ink (no added acid; no measurable pH) ACMI approved non toxic. Comfortable rubber grip. Marks on just about everything including: glass, metal, plastic, photos, foils, coated paper, oily and damp surfaces. Made in the USA of US & Foreign Parts (Fine and Ultra Fine only). Each individual pack contains 8 Markers, Bundle of 6 Packs, 48 Markers total.