These 50mm diameter pulleys are made of low-friction aluminum, have a metal housing, and have hooks at the top and the bottom.
Sold in a pack of 10 pulleys.
PRODUCT WARNINGS
WARNING: This product can expose you to chemicals including nickel and lead, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Our products are not toys. Use in a laboratory or educational setting only. Not for children 13 and under.