Our Garden Marker are 3/4-inch in diameter, plastic barreled with a medium (1.2mm) tip, contain black ink that is fast drying, waterproof, fade resistant, permanent, xylene free, and environmentally friendly. Most importantly for sunny garden use, the ink is resistant to UV radiation so it won't fade over the course of the growing season like standard "permanent" markers.
Works great on wood, metal, glass, plastic, pants, walls, fingers, etc. These markers are a great choice for writing on our White Plastic Plant Stakes.