The Copic Classic Twin-Tip Graphic Ink Marker Pen in YOO Barium Yellow is a high-quality marker from Japan's renowned brand, Copic. With its twin-tip design, this pen allows for both fine and broad strokes, making it versatile for various artistic and creative projects. The vibrant Barium Yellow colour adds a pop of colour to any room, whether it's for drawing, colouring, or any other artistic endeavour.