This Dial 11" Pulley Evaporative Cooler Single Groove 3/4" Bore For 4L V Belt Polea is a great addition to your home cooling system. With its sturdy build and quality materials, it is sure to last you a long time. The pulley is designed to fit a 4L V belt and has a single groove for optimal performance. It is suitable for use with evaporative coolers and is made by the reputable brand Dial. The model number is 6328. This unit quantity of 1 is perfect for replacement or for a new installation.