Set of 12 assorted colours (10 moonlight shades & 2 white) Roller-ball pens, water based gel ink, acid less, water, fade and chemical proof These pens contain luminous gel ink that glows under black light and is brilliantly opaque on black or white paper The 0.5 mm tip gives a creamy, smooth, consistent bold line that won't bleed through on vellum and most papers Application:ideal for greeting cards, scrapbooks, black light art and more. sensationally brilliant colours on dark-colour papers and photos