Support base for skeleton, features a heavy (30 pound) cast iron base with 5 machine grade casters (2 with locks) and a sturdy threaded pole, this skeleton stand will pass the test of time and make the transport of y skeleton easy. Inner diameter of stand is 12.5mm.
Tectonics Model, provide students with an innovative look at plate tectonics with this hand-painted plastic model, showing detailed representations of the earth layers. Both active and passive margins are shown, Oceanic floor spreading is also well-characterized
Model, Aragonite Crystal, is a carbonate mineral, one of the two common, naturally occurring, crystal forms of calcium carbonate, CaCO3, It is formed by biological and physical processes, includes 44 1 inch balls,