6-Piece Optical Lens Set, 1.5", Double Convex and Double Concave Entomology & Zoology_Entomology Supplies and reproductive systems for amphibian

and reproductive systems for amphibian anatomy teaching

pre-assembled on a benchtop base for hands-on fluid-mechanics demonstrations

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

6-Piece Optical Lens Set, 1.5", Double Convex and Double Concave Entomology & Zoology_Entomology Supplies and reproductive systems for amphibianSix 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.