These plastic pulleys are perfect if you want to mount the opener on the side of the coop or anywhere besides directly above the door. You can even use them to open multiple doors at one time (see gallery picture of a customer opening 4 doors with one opener!). Using the Laws of Physics, you can leverage this simple machine. The more pulleys, the more mechanical advantage you have!
Pulley measures 1-3/8″ x 5/16″. Center hole is 1/4″ diameter.