Coplin Staining Jar for 5 Slides, 4.25" Tall Diameter_7mm and plano-concave geometries for safer

and plano-concave geometries for safer student-station optics

the wooden storage box housing the slimmer-format optics shapes for ray-box-friendly experiments

color filters

Metal-base one-meter potentiometer with 24 SWG constantan wire stretched along a millimeter scale

this green LED on a demonstration base with 4mm plug connections lights up when current flows in the correct direction

Coplin Staining Jar for 5 Slides, 4.25" Tall Diameter_7mm and plano-concave geometries for saferCoplin staining jar holds five standard 76 x 25mm microscope slides upright in 4. 25 inches of stain or wash solution during histology processing.