Pulley, 3 1/2″ Double Back Nylon

This double back pulley is commonly used on inlet curtain installations to maintain a 1:1 winching ration when installing the back up hand winch to the side wall.

The main line from the machine goes around the first sheave and is anchored to the hand winch while a second line is anchored to a tie down and travels through the second sheave to the inlet curtains.