Nylon Cleaning Brush for 1"-1.2" Tubes, 8.75" Human Anatomy_Human Anatomy Models and three low-friction nylon wheels

and three low-friction nylon wheels for straight-line momentum experiments

Double-parallel plastic pulley with two 50mm wheels in a steel frame and end hooks

this adjustable board accommodates specimens for butterfly

the f/3 curvature stretching the focal throw for demos that need the focal point set comfortably beyond the mirror face

used to demonstrate capacitance and the discharge of stored static charge

Nylon Cleaning Brush for 1"-1.2" Tubes, 8.75" Human Anatomy_Human Anatomy Models and three low-friction nylon wheelsBuilt for scrubbing narrow diameter glassware, this fan shaped nylon brush rides a twisted stainless steel handle flexible enough to bend around difficult interior angles.