Product Description "Ideal for 11-foot ceilings, this Westinghouse 1/2 ID by 24-Inch Extension Down Rod helps maximize your ceiling fan's cooling benefits by providing the proper height. It features a white finish for a clean complement to your existing ceiling fan. Tapered threaded ends ensure a deeper connection and stronger bond for maximum durability. The extension down rod measures 24 inches long by 1/2 ID, and can be used with Westinghouse or other ceiling fans that require a 1/2 ID ceiling fan extension down rod. For optimum performance and safety, ceiling fan blades should be at least 7 feet from the floor but no higher than 8 to 9 feet in order to best cool a room. For ceilings 9 feet and higher, an extension down rod is required to bring the ceiling fan down to the proper height above the floor. Product reference number 77243." From the Manufacturer This Westinghouse Down Rod is great for any home. To ensure safety when using these ceiling fan blades should be at least 7 feet from the floor but no higher than 8 to 9 feet in order to best cool a room.