Round Convex Glass Mirror, 50mm Diameter, 300mm Focal Length Lab Supplies_Scoops & Spatulas and root development across successive

and root development across successive stages for dicot germination teaching

this electromagnet on a 4mm-terminal base slots inline with other modules for circuit-driven magnetism work

Locking control at any extension on this two-meter retractable tape measure

5cm coil diameter on a 5cm closed-length helix

this two-wire potentiometer mounts on a metal base for stability during extended laboratory measurements

Round Convex Glass Mirror, 50mm Diameter, 300mm Focal Length Lab Supplies_Scoops & Spatulas and root development across successiveConvex glass mirror at 50mm diameter and 300mm focal length, ~2mm thick, the longest focal value in the 50mm convex line giving the gentlest divergence and largest virtual image.