Liquid Propane Bunsen Burner, No-Tip Safety with expanded base prevents tipping, even with hoses connected and easy carry handle for safe handling, The flame stabilizer comes standard and the is available in both Natural Gas and Liquid Petroleum variants, 6.5inch tall.
Double Convex round Lens, Material: Glass, designed for physics and educational uses, Because of their educational use design, there may be minor imperfections that do not affect physical function, for educational uses, Size: 200mm focal length, 2in diameter and 5.5mm thick