Fineline Masking Fluid Pen 20 Gauge W/Masking Fluid, 1.25 Ounces Applicator Bottles This package contains one 1.25oz (37.5 ml) bottle of masking fluid with a 20 gauge (.5mm) tip and one separate cap for storage. Made in USA. The unique Cap/Wire system is non-clogging and air-tight Use with acrylics, ink, gutta, watercolors, oil paints, silk dyes, stains, henna, water-based glues, glazes, and more (all sold separately) This package contains one 1.25 fl-oz (37.5 ml) bottle with a 20 gauge (.5mm) tip