4GX _HIGH QUALITY BPA FREE PLASTIC: Made of durable and quality BPA free non-toxic plastic material keeping kids in mind. Uses good quality magnetic straps that makes it easy to use. We assure of the quality of the product, please contact us for any manufacturing defects. CALCULATOR AND DUAL-SHARPENER: This 2-sided pencil box comes with a calculator at the top for your kids to aid in quick calculation. This stylish pencil case also has 2 built-in sharpeners for different types of pencils and color pencils. Uses magnetic straps on both sides for opening and closing.