High quality eraser made of a mixture of sand and rubber. Designed to remove both pencil and ink markings, including ballpoint, rollerball, and some marker. Sand side erases ink; rubber side erases pencil markings. Non-PVC and phthalate-free. Eraser Type: Pencil/Ink Marks; Eraser Shape: Rectangular Block; Eraser Size Type: Medium; Eraser Color: White.