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
Premium Bosshead - Die Casted, Right angle Clamp Holder, Classic Die Cast Alloy, finished in non toxic powder coating, 2 Stainless Steel Thumb Screws, Able to hold rods up to 15 mm in diameter, Holds rods orthogonal (90 degrees) to one another
Specific Gravity Metal Cylinder Set Copper, Zinc, Aluminium And Steel, Four Different Metal Cylinders Each Measuring 38 mm Long X 10 mm In Diameter, Made Of Aluminium, Zinc, Copper And Steel.