Demonstration Spherometer Subcategory_Weights and Masses supplying replacements when the originals

supplying replacements when the originals lose loft or split during repeated charging cycles

the 90-45-45-degree faces redirecting wider beams for total internal reflection and image-inversion work

supplying an inert electrode that conducts current without contributing its own ions to the cell reaction

Red LED on a demonstration base with 4mm plug connections

Demonstration Spherometer Subcategory_Weights and Masses supplying replacements when the originalsDemonstration spherometer with an oversized 133 mm dial head and baked enamel finish, letting an entire classroom read spherometer values before students work with benchtop units.