These extra-broad markers have a 15mm (about 5/8") wide square tip which is great for large lettering and coloring in spaces.
Posca markers contain opaque water-based paint for marking on almost anything: metal, wood, glass, plastic, plaster, canvas and more. Will bond permanently to wood, clay pots, posterboard, plaster and other porous materials. Marks on non-porous/sealed surfaces are waterproof but can be removed with an ammonia-based cleaner. Acrylic-type paint is non-toxic, acid-free, odorless, lightfast, and Xylene-free.
This set includes one each of the following colors: Pink, Light Blue, Green, and Yellow. Replacement tips for this marker can be found here