Zig 50mm Illumigraph Biggie Tip Marker, White High-fluorescent marker features a 50mm broad tip and is wet-erasable on most surfaces Ideal for use on plastic, glass, metal and a variety of other surfaces Perfect for writing large letters on signs, white boards and more Particularly effective under light Conforms to astm d4236 standard; available in white color High-fluorescent marker features a 50mm broad tip and is wet-erasable on most surfaces Perfect for writing large letters on signs, white boards and more Particularly effective under light Conforms to astm d4236 standard; available in white color