KleenSlate black dry erase markers with eraser are the best markers for the classroom. They are certified nontoxic, low odor and made to be in the hands of young students and adults. They last through the wear and tear of everyday use in schools, offices and homes. The eraser in the cap adds convenience and efficiency to our markers so you never have to find an eraser or use your finger. Details: Black5" (12.7 cm) tall36 markersThe eraser in the cap adds convenience and efficiency to our markersCertified nontoxic and low odor48 hour Cap-off InkMarkers conform to CPSIA and ASTM D-4326 Standards