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5N Screw Spring
battery type
Alnico bars
Comprehensive Set: Explore the wonders of geology with this set of 9 rock samples
Projectile Launcher Experiment Kit 5N Screw SpringIncluded: Spring loaded gun, two 1" dia. balls (one steel, one aluminum), 4 experiments, protractor attachment, plumb bob, brace, and instructions. The range is variable up to 10', and it measures any angle up to 90 within 1 2 accuracy with the plumb bob. It's built to withstand the rigors of any hands on lab and precision machined to give the same result every time. Rugged and Durable Construction. Easy Assembly. Consistent Classroom Results. Spring
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