Double Convex Lens, Highly polished, optically true lens is excellent for physics classroom demonstrations in optics and light refraction, with ground edges, great for physics classrooms, with highest grade, Size: 300 mm focal length, Lens measures 3in diameter, 0.1 weight
Test Tube, Flat bottom, with bakelite screw cap, Material: Made from high quality, heavy duty, Borosilicate Glass, Dimension: 25x95mm, capacity: 30ml, pack of 24
Practi-Amp* Safety Breakers for 10 mL Practi-Amps*, avoid direct finger contact with broken glass during and after practice thus eliminating the fear of cuts from poor technique, safe, reliable and economical Ampule Breakers ampule manipulation