Pulley Large Demonstration Single, Designed for Classroom Demonstrations, Light-weight, low-friction, and deformation-resistant plastic ensures accurate results, Open to make it easier for users to run pulley cords through them
Enhanced Levitator Large, intended for science demonstrations. They are easy to use and highly durable. The levitators are provided with 6 months full no-questions-asked warranty. Able to carry only their own weight + liquid nitrogen.