US$ 80.00
dual bore sights
mechanical-advantage
Seventy-times enlarged skin cross section reveals epidermis
the numbered dicot leaf model on a base maps epidermal
Built on a leveled cast-iron base with a dual-angle polymer top
12V DC Hand Crank Generator with Light Bulb Biology_Dissection dual bore sightsHand cranked 12V DC generator in a clear plastic case with a front mounted lamp and binding posts, demonstrating mechanical to electrical energy conversion as the crank lights the bulb.
US$ 80.00
US$ 199.50
US$ 49.99
US$ 24.00