SEOH Lens Glass Double Convex 75mm x 15cm Focal Length

Catahoula, 100% Tarred Nylon Twine, Abrasion and Rot Resistant Multi-Purpose Braided Twine (#36 1/4 lb)

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)

Amlong Crystal 6 inch Optical Glass Triangular Prism for Teaching Light Spectrum Physics and Photo Photography Prism, 150mm

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

Prism, Equilateral 6" ~ Glass

Fallkniven CC4 Ceramic Whetstone Sharpener W/Leather Pouch, White/Gray

SEOH Lens Glass Double Convex 50mm x 10cm Focal Length

Ajax Scientific Polished Glass Double-Convex (Bi-Convex) Lens, Spherical, 50 mm Diameter, 100 mm Focal Length