Optically Worked Double Concave Glass Lens, 75mm Diameter, 300mm Focal Length, Alternate Model Subcategory_Filter Funnels Nine engraved 10 gram brass

Nine engraved 10 gram brass pieces and a 10 gram hanger on this slotted weight set

The kit is suitable for age 13 and older with adult supervision

Four-pack of 500mL polypropylene graduated cylinders features octagonal anti-roll bases for mid-volume measuring without glass breakage risk

and a central control module

Optically Worked Double Concave Glass Lens, 75mm Diameter, 300mm Focal Length, Alternate Model Subcategory_Filter Funnels Nine engraved 10 gram brassAlternate model 75mm double concave glass lens at 300mm focal length, parallel build to the main line 300mm focal model with ground polished edges for replacement or backup inventory.