These large pulleys are made of plastic, have a metal housing, and have hooks at the top and the bottom. Their size makes them easier to observe when teaching or experimentsing with pulleys. All wheels are 7cm in diameter. This is a single pulley.
WARNING: This product can expose you to chemicals including styrene, 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.