18 in. Brushed Aluminum Ceiling Fan Extension Downrod for Modern Forms or WAC Lighting Fans3 4 in. down rods can be used to extend down rod ceiling fan height. Down rods are available in 12 in., 18 in., 24 in., 36 in., 48 in., 60 in. and 72 in. sizes along with a variety of finish options to match your fan finish. Down rods can be joined together using a down rod coupler (DC xx) to make lengths greater than 72 in. and may also be shortened in the field. 3 4 in. down rods can be used to extend down rod ceiling fan height, down rods cannot be