Concave Glass Mirror, 50mm Diameter, 150mm Focal Length Pack Size_Single providing dense uniform spheres for

providing dense uniform spheres for ramp-and-collision experiments where a heavier projectile is needed than the plastic marbles can provide

Enlarged mandible model exposes lower jaw teeth

Six-pack of polished stainless steel spatula-scoops with one rounded end and one pointed end

Tandem double plastic pulley pairing 38mm and 50mm low-friction wheels on an open-sided steel frame

Concave Glass Mirror, 50mm Diameter, 150mm Focal Length Pack Size_Single providing dense uniform spheres forConcave glass mirror, 50mm diameter and 150mm focal length, the f 3 curvature stretching the focal throw for demos that need the focal point set comfortably beyond the mirror face.