The Combo of Triangular Water Colour Pencil with Oil Pastel is a set of art supplies that includes a combination of watercolor pencils and oil pastels. Watercolor pencils are a type of colored pencil that can be used dry or wet. When used dry, they produce a light, subtle color. When water is added to the paper, the color becomes more vibrant and can be blended to create a watercolor effect. The triangular shape of the watercolor pencils makes them comfortable to hold and helps prevent them from rolling off a table or desk. Oil pastels, on the other hand, are a type of drawing medium that produces a rich, vibrant color. They are made from a mixture of pigment, wax, and oil, which gives them a soft, buttery texture. They can be blended together to create a range of colors and effects. Overall, this set provides a range of drawing and coloring options for artists. The watercolor pencils can be used to create delicate washes of color, while the oil pastels can be used for bolder, more vibrant drawings. The combination of these two mediums allows artists to create a wide variety of effects and styles in their work.