Real Coal Specimen with Cotton Bag, Large Lump Included_Rod & Base 5-inch compact and 6-inch long-format

5-inch compact and 6-inch long-format units

this galvanic skin response data-logging sensor tracks changes in skin conductivity tied to emotional and physiological states

and the structural elements of geological faults through a five-piece teaching model with an identification key

Larger-bore standard-taper joint pairs with an angled bend to route condensate downstream into the receiving flask during preparative organic chemistry

Seventeen-material solids kit with two pieces of each substance in mixed sizes

Real Coal Specimen with Cotton Bag, Large Lump Included_Rod & Base 5-inch compact and 6-inch long-formatPart novelty gift and part geology specimen, this single large lump of genuine American coal ships in a cotton drawstring bag with a linked science experiment activity.