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12pc Cylindrical Bars Density ID Set - Hardwood, Softwood, Aluminum, Copper, Brass, Rubber, Nylon, Derlin, PVC, Glass, Acrylic & Teflon - Includes Storage Block - Study Density & Mass - Eisco Labs:
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12pc Cylindrical Bars Density Set, Aluminum - Various Lengths - Includes Wooden Storage Block - for Studying Density & Mass - Eisco Labs: Amazon.com: Industrial & Scientific
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Metal Cylinder Set, Aluminum, Zinc, Copper & Steel, 1.5" x 0.4", For Density Investigation, Specific Gravity
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