SEOH 50mm x 100mm Focal Length Double Convex Glass Lens

Ajax Scientific Polished Glass Double Lenses Spherical (Bi-Concave), 50mm Diameter, 150mm Focal Length

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)

FORMUFIT P002FGP-WH-5 Schedule 40 PVC Pipe, Furniture Grade, 5', 2" Size, White

SEOH Lens Glass Double Concave 50mm x 5cm Focal Length

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

FORMUFIT F002EEC-WH-10 PVC External End Cap, Furniture Grade, 2" Size, White (Pack of 10)

SEOH Lens Glass Double Convex 38mm x 10cm Focal Length

SEOH Lens Glass Double Concave 38mm x 50mm Focal Length