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

the chrome-plated metal frame and handle keeping the reading magnifier classroom-durable

supporting both qualitative and quantitative force-vs-distance student investigations

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

tape-clamping screws

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.