US$ 399.50
Sectional 3D plant cell model exposes cell wall
metal roller
DIS ignition coils
Compact 150mm black 4mm-stackable lead with nickel-plated split-hollow pins
sodium benzoate
Plano-Cylindrical Concave Lens, +17 Diopter, 50 x 50mm Science at Home_Life Science Sectional 3D plant cell modelPlano 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.