Plano-Cylindrical Concave Lens, +17 Diopter, 50 x 50mm Category_Plasticware letting students read low-cell voltages

letting students read low-cell voltages and high-tension supply outputs on the same meter

Five removable sections separate the enlarged ear into outer

Hundred-microfarad electrolytic capacitor in an ABS module with 4mm sockets

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

Copper calorimeter stirrer at 6 inches tall with a 3

Plano-Cylindrical Concave Lens, +17 Diopter, 50 x 50mm Category_Plasticware letting students read low-cell voltagesPlano cylindrical lens at 50 by 50mm with 17 diopter optical power and ground polished edges, the cylindrical curvature focusing light to a line rather than a point in optics demos.