Explore weight and measurement with these easily stackable Hexagram® Weights. Color-coded weights offer visual cues in measurement activities. Each set of 54 includes twenty 1g, twenty 5g, ten 10g and four 20g weights. Sold as 2 sets for a total of 108 pieces.. Stackable, color-coded weights are great for inspiring an early love of learning about weights and measures. A versatile set for your math classroom or elementary science lab. 54 weights per set, sold as 2 sets, 108 weights total. 8+ years. Grade 3+