Ray box, simple, safe and sturdy source of projected light for many classic optics experiments, produces parallel convergent rays across a plane horizontal surface and the rays are intense enough to be traced in natural light. Built in solid aluminum extrusion casing, 100-240V 50/60 Hz
Green Chemistry Kit, Production of Biodiesel, Kit Includes: 2 X 500mL Vegetable oil, 5 X 25mL Methyl alcohol, 10g Potassium hydroxide, 2 Microburners, Kit contains enough materials for 5 groups of students, with Teachers Manual and Student Study Guide