137-Piece Premium Student Molecular Model Set, 66 Atoms + 70 Bonds Item Type_Mug Designed to recharge the cells

Designed to recharge the cells used in laboratory apparatus

5mm metric threads

this 4-inch carbon-steel needle pivots on a brass cup bearing for low-friction rotation under the local field

and hinge-distance scales adjustable from 0 to 45 degrees

the longest focal value in the 50mm convex line giving the gentlest divergence and largest virtual image

137-Piece Premium Student Molecular Model Set, 66 Atoms + 70 Bonds Item Type_Mug Designed to recharge the cellsUsed to study organic isomerism and stereo geometry, this 137 piece premium student molecular model set ships with 66 atoms and 70 bonds and detailed instructions in a fitted storage box.