Make a solution and watch it change to amber, then to blue-purple and back to colorless. You can do the experiment 2-3 times.
Related Items: CK-600, CK-150, CK-250, CK-350

Technical Details

Size (LWH): 4.4 inches, 4 inches, 0.1 inches
Product Details
Product Dimensions: 4.4 x 4 x 0.1 inches
Shipping Weight: 0.45 pounds (View shipping rates and policies)
ASIN : B009P8BF5W