6-Piece Optical Lens Set, 1.5", Double Convex and Double Concave Entomology & Zoology_Entomology Supplies Teaches proper brushing technique through

Teaches proper brushing technique through a 3x life-size jaw model with gums and oversized toothbrush

this pack of premium qualitative filter paper offers medium-speed gravity filtration with a 10-micron pore size at 85 gsm weight

Bobbin-wound coil for the demountable transformer with panel-mount 4mm sockets and an enclosed earth connection

the sealable cavity holding water or other liquids to study Snell's law refraction across multiple media

6-Piece Optical Lens Set, 1.5", Double Convex and Double Concave Entomology & Zoology_Entomology Supplies Teaches proper brushing technique throughSix piece 1. 5 inch optical lens set with three double convex and three double concave lenses at 200mm, 300mm, and 500mm focal lengths for comparing converging and diverging behaviors.