This eraser is perfect for use on paper and matte drafting film. It is practically residue free. It offers superb and accurate erasing. It comes wrapped in protective cellophane. It is recommended for ages 7 and above, but is suitable for all ages. This Staedtler Mars Plastic Eraser can be used on both paper and matte drafting film. It offers practically residue free erasing for precise and clean results. It comes wrapped in cellophane which ensures it is clean when you first use it.