EISCO Optical Glass Lens Set - 3 Dbl Convex, 3 Dbl Concave, 38mm Dia - 20, 30, 50cm FL

Eisco Labs 6 Piece Premium Optical Glass Lens Set, 50mm Diameter - 3 Double Convex (20, 30, 50cm FL) and 3 Double Concave (20, 30, 50cm FL)

United Scientific LCV108 Glass Double Convex Lens, 100mm Diameter, 200mm Focal Length

Amlong Crystal 2.5" Optical Glass Triangular Prism for Teaching Light Spectrum Physics and Photo Photography Prism, 60mm

Super Z Outlet Mini Round 2" Inch Small Glass Mirror Circles for Arts & Crafts Projects, Traveling, Framing, Decoration (50 Pieces)

Optical Glass Lens Set - 3 Dbl Convex, 3 Dbl Concave, 75mm Dia - 20, 30, 50cm FL

Eisco Labs Optical Glass Lens, Double Concave, 75mm Diameter, 20cm Focal Length - Ideal for Top Spinning

ELEGOO 3pcs MB-102 Breadboard 830 Point Solderless Prototype PCB Board Kit for Arduino Proto Shield Distribution Connecting Blocks

Eisco Labs Double Concave Glass Lens 75mm Diameter, 50 cm Focal Length - 1 Single Lens

AmazonBasics PETG 3D Printer Filament, 1.75mm, Black, 1 kg Spool