These pulleys are made of low-friction aluminum, have a metal housing, and have hooks at the top and the bottom. The housing on this pulley holds two aluminum pulleys stacked on top of each other in tandem with the larger of the wheels being 50mm in diameter and the smaller being 38mm in diameter.
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.