Density Set - PVC, Set of 12 PVC bars of different length but the same diameter. Students learn that the density of a substance is constant even as its mass and volume change. Comes in an attractive wooden holder
T-Shaped Flint Glass Connecting Tube, Arm Length: 1 1/2in, For joining two rubber tubes to a common tube at right angles. Safer connections are provided as the ends have constrictions to hold rubber tubing securely, Size: 1/4in ID X 5/16in OD (7.9mm)
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