Eraser residues stick to eraser due to its tacky polymer mixture. The solution to prevent small eraser bits on sketches, designs or technical drawings.MONO dust CATCH collects its own residues: Due to a special polymer formula small eraser bits stick to the eraser and do not remain on the paper. This enables an especially clean erasing and avoids that drawings are unintendendly damaged by eraser residues.Material: PVC, phthalate free and latex free. Weight: 19 g. Features Target audience Adult Refillable No Product colour Black Material Polymer Packaging data Quantity per pack 1 pc(s) Other features Doesn't contain Latex, PVC, Phthalate