Dr. Ph. Martin's Radiant Concentrated Water Color (1A) Watercolor Bottle, 0.5 oz, Lemon Yellow, 1 Bottle Lemon yellow (1A) in a 0.5 oz. glass bottle with dropper Brilliant and highly concentrated color ideal for nearly any porous surface Transparent watercolor dye for brush, pen, or airbrush 56 Unique colors available across four different sets Made in the USA