Optically Worked Double Concave Glass Lens, 75mm Diameter, 500mm Focal Length Subcategory_Stirring Bars and Rods Aluminum-handled collecting net swings lightweight

Aluminum-handled collecting net swings lightweight through tall grass and air sweeps for classroom field trips and introductory entomology sampling work

Many industrial and hobby hot wire foam cutters also use chromium wire

Aluminum mounting pulley with a 2-inch (50mm) diameter wheel and a tapped hole sized for rods up to 13mm

and gray links in a 4-compartment storage case

Optically Worked Double Concave Glass Lens, 75mm Diameter, 500mm Focal Length Subcategory_Stirring Bars and Rods Aluminum-handled collecting net swings lightweightVery long focal 75mm double concave glass lens at 500mm focal length, the gentle diverging curvature yielding subtler virtual image reduction for nuanced refraction work.