Iron Wire Gauze, 5 x 5", 10-Pack Face Size_50mm and built-in component and continuity

and built-in component and continuity testing

the moderate curvature spreading light gently for divergence and virtual-image-formation work in refraction demos

One-inch brass ball that threads onto a pendulum string as a heavier metal counterpart to aluminum or steel balls in mass-dependent periodic-motion investigations

Wider-aperture 75mm convex glass mirror at 100mm focal length

this cover-protected single rheostat carries a constantan winding with 4mm safety socket terminals

Iron Wire Gauze, 5 x 5", 10-Pack Face Size_50mm and built-in component and continuityBuilt to diffuse Bunsen flame heat, this pack of 10 iron wire gauze squares measures 5 x 5 inches for supporting beakers and flasks above the burner.