The Good Directions 401ALCC Adjustable Aluminum Garden Weathervane Roof Mount is constructed of durable aluminum to be as long lasting as your weathervane. This roof mount is designed for all garden size weathervanes and accepts up to 11/32" diameter weathervane poles. This roof mount is 9-Inch long, 5-3/4-Inch high, 2-1/2-Inch wide and its mounting plates measure: 2-1/2-inch x 2-1/2-Inch with 4 mounting holes per plate. Stainless steel screws for mounting are included.