Model, Basic Crystal Structures, Set of 9, is a valuable teaching aid for physics and chemistry, Similar patterns of atomic arrangement reappear in large numbers of different substances, Dimensions: 28 x 20 x 19 in
Replacement Geriatric LOR Insert for epidural and spinal injection trainer, to practice with the specific anatomical deformations of the spine of an elderly patient, easily replacable, Contents: Geriatric Insert, Spinal Tube
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