7.5cm Ring with Boss Head Clamp Subcategory_Rulers and Measuring 5x clear views through a

5x clear views through a 3-inch optical-glass lens with a 6-inch focal length

Large-wheel pulley mounted on a universal clamp for attachment to retort rods or support stands

and a central control module

generating enough output in direct sunlight to spin a small motor or propeller during photovoltaic and renewable-energy student investigations

Equal-mass density set in aluminum

7.5cm Ring with Boss Head Clamp Subcategory_Rulers and Measuring 5x clear views through aIntegrated boss head joins a 7. 5 cm closed ring on this plated mild steel retort accessory, accepting vertical support rods up to 5 8 inch on standard laboratory stands.