Double Concave Glass Lens, 50mm Diameter, 250mm Focal Length, 3mm Thick Racks & Stands_Flask Stands Color-coded life-size brain model distinguishes

Color-coded life-size brain model distinguishes cortical lobes

5 inches producing 50-60 dots per second via a vibrating striker

Mid-length 750mm red insulated lead with a 4mm banana plug at one end and a crocodile clip at the other

gripping flasks and condensers up to 4

drawing 4-6V DC through 4mm sockets to demonstrate how current produces a concentrated magnetic field

Double Concave Glass Lens, 50mm Diameter, 250mm Focal Length, 3mm Thick Racks & Stands_Flask Stands Color-coded life-size brain model distinguishesSlim 3mm thick double concave glass lens at 50mm diameter and 250mm focal length, the diverging curvature paired with low mass for ray box mounts and lightweight optics setups.