The magnetic balls are made from N35, strong and durable. It can be distorted to any shape you like, fun and interesting. Stimulate baby's imagination and creativity, promote brain development, suitable for both children and adult. Features: You can build up any shape and model you want, stimulate imagination and creativity. It can also used as a educational tool, improve students' knowledge of geometry and math. Exercise your left and right brain at the same time, promoting brain development. Can also used as a stress reliever tool, it can be distorted to any shape. With a storage box included, portable and convenient to carry along, you can play it anytime anywhere you like. Specification: Condition: 100% New Item Type: Magnetic Balls Material: N35 Color: Silver Quantity: 1000Pcs Diameter: Approx. 3mm/0.12in Weight: Approx. 141g Package Included: 1000Pcs Magnetic Balls 1 * Metal Box Note: Please allow 0~1 inch error due to manual measurement. Thanks for your understanding. 1You can build up any shape and model you want, stimulate imagination and creativity 2It can also used as a educational tool, improve students' knowledge of geometry and math 3Exercise your left and right brain at the same time, promoting brain development 4Can also used as a stress reliever tool, it can be distorted to any shape 5With a storage box included, portable and convenient to carry along, you can play it anytime anywhere you like Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin