Jumbo Permanent Markers Set: jumbo black markers are made with the highest-quality water-based acrylic ink. That is waterproof, quick dry, long-lasting, and smooth ink flow Safety First – Our graffiti paint markers are non-toxic, Each thick permanent marker meets ASTM d-4236 and EN-71 safety standards, are suitable for artists of all ages, working seamlessly on rock, fabric, glass, wood, plastic, paper, and more 3-IN-1 NIB: (fine, medium, and jumbo) The thick tip permanent markers felt wide tip is not only equipped with 3-IN-1 nib, but also allows the jumbo marker paint pen to produce smooth and even ink MULTI-SURFACE: Our permanent jumbo poster markers are versatile enough to be used on a variety of surfaces, ideal for wall-painting, posters, stone, ceramic, glass, wood, fabric, canvas, plastic, metal, resin, terracotta, seashell, and more The permanent graffiti markers black set is perfect for artists to use on DIY designs, arts, and crafts, and painting projects. These black paint markers are also great gifts idea