Round Convex Glass Mirror, 75mm Diameter, 75mm Focal Length Capacity_17mL no longer fitting once heating

no longer fitting once heating expands its diameter

the lower-cost benchtop alternative to the full-meter resistivity boards for quantitative R = rho*L/A and material-comparison investigations

supplying clean low-voltage current to introductory electronics

this decade resistance box substitutes for fixed resistors in circuit experiments

Magnetic-base pulley with a 50mm ball-bearing plastic wheel

Round Convex Glass Mirror, 75mm Diameter, 75mm Focal Length Capacity_17mL no longer fitting once heatingDesigned for divergence demos at scale, a 75mm aperture convex glass mirror at 75mm focal length and ~2. 8mm thickness produces reduced virtual images with a notably widened apparent field.