This Resist Pen from Fineline is a 20-gauge, 1/2" long needle applicator tip that comes with a 1.25 oz.bottle of masking fluid. It has a unique cap/wire system to ensure a continuous flow of liquid from start to finish. When closed, the cap maintains an airtight seal so that the masking fluid never dries out and is always ready to use.Use to make precise, controlled lines, dots, or area coverage with ease. Details:1.25 oz.bottle of masking fluidStainless steel 20-gauge needle applicator tipReusableHypo-allergenic