Fluorescent under black light. Contents: 5 Fine Point Permanent Markers. Vivid ink leaves permanent mark on most surfaces. Durable, fine tip produces bold, detailed lines. Great for use on paper, plastic, glass, wood and leather. AP certified nontoxic ink is water, smear and fade-resistant. ACMI AP: Art & Creative Materials Institute certified. Conforms to ASTM D 4236. Non toxic. Guarantee: If you are not completely satisfied with your product, please return for refund, repair or replacement: In the United States, return to: Newell Rubbermaid Office Products, 2707 Butterfield Road, Oak Brook, Illinois 60523, Attn: Consumer Affairs. In Canada, return to: Newell Rubbermaid Office Products Canada, 586 Argus Road, Oakville, ON Canada L6J 3J3, Attn: Consumer Affairs. Australian consumers see www.sharpie.com/enAU/warranty.aspx. Uncap what's inside. Sharpie.com. Assembled in USA.