Round Convex Glass Mirror, 50mm Diameter, 300mm Focal Length Lab Supplies_Scoops & Spatulas 5cm coil diameter on a

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

Heavier-grade wire stripper with hardened cutting jaws

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

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

Pack of 6 borosilicate 3

Round Convex Glass Mirror, 50mm Diameter, 300mm Focal Length Lab Supplies_Scoops & Spatulas 5cm coil diameter on aConvex 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.