Hey science teachers and lab enthusiasts! This Eisco Labs specific gravity cylinder set is exactly what you need for those cool density experiments and physics demonstrations. You get four different metal cylinders - aluminum, steel, brass, and copper - all perfectly sized at 5cm long and 13mm in diameter. They're super handy for teaching students about density, specific gravity, and material properties in a hands-on way. Each cylinder has a little hook that makes them easy to hang from scales or spring balances when you're doing those buoyancy and displacement experiments. The metals are clearly different in weight and composition, which makes for great comparative studies - students can actually feel the difference in density between aluminum and copper, for example. They're made with that quality Eisco craftsmanship that science teachers have come to trust, so they should hold up well even with regular classroom use. Perfect for high school physics labs, college science courses, or even home science enthusiasts who want to do proper experiments. The consistent sizing means you get accurate, reproducible results every time you use them. Whether you're demonstrating Archimedes' principle, teaching about material density, or having students calculate specific gravity values, these cylinders make the concepts so much more tangible and understandable. They store easily in a lab drawer or toolbox, and the hooks prevent them from rolling around. Seriously, if you're tired of trying to improvise with random objects for density experiments, this professionally designed set will make your science lessons so much more effective and engaging for students!