Hardwood Insect Pinning Block with 5-Hole Step Heights Color coded periodic table Periodic table Chemical elements Periodic table poster the ferrous reference specimen in

the ferrous reference specimen in the metal density series

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

4 inch dimensions in aluminum

Graphite lattice kit whose atoms and connecting rods assemble into planar carbon sheets

durable enough for repeated classroom handling

Hardwood Insect Pinning Block with 5-Hole Step Heights Color coded periodic table Periodic table Chemical elements Periodic table poster the ferrous reference specimen inStepped five hole pinning block sets each insect pin at a consistent height, standardizing specimen mounting position across an entomology collection.