Kearing Colorful Heat Erasable Pen Set includes 4 colors: white, blue, black, and red. Perfect for temporary marking in sewing, quilting, embroidery, patchwork, and craft projects. Features a 1.0 mm roller ball tip with water-based ink formula for smooth and precise marking. The markings can be removed easily by ironing with heat or washing with water. Shelf life: 1 year. Please pre-test on a fabric scrap before use.