Hand-Painted 3D Starfish Sectional Anatomical Model on Base, 18 x 16 inch Light & Optics_Spectroscopy Copper-block plug key switch with

Copper-block plug key switch with two 4mm terminals and a removable plastic-guarded plug

Used to determine irregular-object volumes by water displacement

Labeled-terminal 50-ohm resistance unit at 7

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

Open back reveals spine and posterior musculature while the head section preserves upper-body context

Hand-Painted 3D Starfish Sectional Anatomical Model on Base, 18 x 16 inch Light & Optics_Spectroscopy Copper-block plug key switch withThree dimensional starfish sectional model reveals echinoderm anatomy, water vascular system, and radial symmetry for marine biology teaching.