The C9 Ink Cube is a premium dye ink that provides vibrant and fast-drying color. The cube features an extra firm foam pad that results in crisper images with more even coverage. The ink cube is acid-free and made in the USA, and its raised 1 x 1-inch surface makes it easy to apply ink to small or intricate stamps. Cobblestone color is a neutral, earthy shade of gray-brown that resembles the color of natural stone paving.