Double Concave Glass Lens, 50mm Diameter, 100mm Focal Length, 16.5mm Thick Subcategory_Alternative Energy One-amp DC scale on a

One-amp DC scale on a 315x115mm laminated panel with sealed shunt

expanding and closing to suit different optical-component sizes on a single bench-mounted holder

Hand-painted animal cell model reveals organelle structures

and an 18mm attachment diameter for pulling small weights in mechanical-advantage experiments

applying tension to material strips until failure for breaking-strain and tensile-strength measurement in materials-science work

Double Concave Glass Lens, 50mm Diameter, 100mm Focal Length, 16.5mm Thick Subcategory_Alternative Energy One-amp DC scale on aDouble concave glass lens at 50mm diameter and 100mm focal length, a thick 16. 5mm blank with optically true surfaces, the diverging curvature producing virtual upright images for refraction work.