Derale 17218 This 18″ heavy duty standard rotation fan features beautifully polished and chrome plated steel hubs and 6 polished stainless reinforced blades with a large surface area that improve performance and fuel economy and is rated up to 10,000 rpm. The large surface area of the blades pull more air at lower speeds than other flex fans.
Features: Improves performance and mileage. Heavy duty steel hubs. Durable stainless blades. Rated up to 10,000 RPM. Large surface area pulls more air at low speeds. Reinforced blade construction extends fan life. 18″ standard rotation flex fan design. Specifications: Diameter: 18-1/4″, Flange bolt spacing: 1-3/4″ – 2-1/4″, Depth: 2-3/8″, Mounting surface to front: 1/2″, Mounting surface to rear: 2-1/8″, Rotation: Standard (clockwise), Hub construction: Chrome plated steel’, Blade construction: Polished stainless.