US$ 40.99
Heavy-gauge steel inclined plane with built-in vertical
Conversion chart for SWG/AWG/Inches:
Sectional 3D plant cell model exposes cell wall
and 50mm wheel diameters in open-sided frames
Plano-Cylindrical Concave Lens, +17 Diopter, 50 x 50mm Science at Home_Life Science Heavy-gauge steel inclined plane withPlano 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.
US$ 40.99
US$ 148.99
US$ 23.99