ETA hand2mind 7-Piece Metric Hexagonal Bar Mass Weight Set Learn and experiment with mass, weight, measurement and comparison with this set of hexagonal masses Perfect for classrooms, student work, one-on-one instruction, or small group projects with a scale Perfect hands-on teaching aid for children Includes 50-gram and 100-gram (2 each), and 200-gram, 500-gram, and 1000-gram (1 each) weights Set of 7 metal, hexagonal weights