Rugged yet lightweight, this 3D diagram brings an added dimension to the learning process - helping to distinguish superficial features from deep-lying structures. Molded of tough, lightweight plastic, each chart is furnished with an eyelet at the top • ready-to-hang • yet is rigid enough to stand up on an easel. They'll stand up to punishing hands-on usage too. Each neck anatomical chart measures 18x25 inches (46x64cm).