This non-clogging, airtight cap/wire applicator tip system is specially designed to ensure the steady flow of fluid for smooth, endless lines. Ideal for use with acrylics, inks, gutta, watercolors, oil paints, silk dyes, stains, henna, water-based glues, glazes and other liquid media. The long 20-gauge stainless steel needle offers an easy-to-use, precise placement, free-flow, non-clogging masking fluid pen system. This applicator fits most 2 oz. bottles.