This 16 in. long aluminum sleeve, base plate is 8 in. x 8 in. for a dock flagpole mount is for 15 ft. & 20 ft. flagpoles, this base is for a pole with a 2-1/2 in. outside diameter.
This 16 in. long aluminum sleeve, base plate is 8 in. x 8 in. for a dock flagpole mount is for 15 ft. & 20 ft. flagpoles, this base is for a pole with a 2-1/2 in. outside diameter.