DIAL MFG INC 6149 3-3/4x1/2 Var Pulley

Variable pulleys must be opened 2-1/2 to 5 in full turns, depending on air resistance or motor will overheat. If motor cycles, open variable pulley until motor stops cycling. If cycling persists when pulley is fully opened, you must use the next size smaller pulley. Always use pulley size recommended by cooler manufacturer.

The product is The product is highly durable and easy to use Easy installation and easy handling