These pulleys have wheels stacked side by side and are anothergreat item for exploring physics lessons that teach force, motionand energy.

Check out this quick video that demonstrates how these pulleys can be used in the classroom:

Single Pulley
$1.20, 8/$8.00
Double Pulley
$1.50, 8/$10.00
Triple Pulley
$2.50, 8/$18.00
Quadruple Pulley
$3.00, 8/$22.00