Baluue 4Pcs Density Block Set, Copper, Iron, Aluminum and Wood Metal Density Cubes for Science, Physics Lab Experiments and Gravity Teaching Aid, 20mm (0.79 Inch)
Special Features
4 different materials for easy comparison
The storage box packaging is convenient to take and carry
Digital control processing technology, precise size
Competitively priced and reliable quality
Onepiece molding, flat and smooth
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