The premium quality colored erasers are individually packaged with protective paper wrapper and sliding sleeve for convenient handling. The erasers specially designed to lift lead markings off paper with very light pressure. They remove graphite marks cleanly and completely from paper, vellum, drafting film and more. Specifications: Package Includes: 10 x erasers Size: 1.97"(50mm)long x 0.79"(20mm)wide x 0.39"(10mm)high Material: rubber Color: As shown in the picture Note: Please keep the erasers away from the kids under 3 years old in case of swallowing. The colors may exist slight difference due to different screens. Please allow slight difference in dimension due to manual measurement. Q:What is the material of the erasers? A:They are made of high quality rubber, durable, non-toxic and soft material. Q:Is It Waterproof? A:They still work even gone through the washing machine. Q:What is the dimension of the eraser? A:The gradient eraser is 1.97"(50mm)long x 0.79"(20mm)wide x 0.39"(10mm)high. Q:Is it toxic, and will it break down into micro plastics as its used to erase? A:It is non-toxic. First-class erasing performance with minimal crumbling and no ghosting of eraser on paper. Q:How many erasers per pack? A:There are 10 erasers in the package.