The Menics MAM-470R-20 adjustable plastic base is made for use with the PTE/PTM, PME, MT4/5, and MT8 tower lights and MS66, ASG, and MS86 beacon lights. Used with 20 mm diameter pole. Adjustable up to 90 degrees so the tower or beacon light can be set at an angle. Dimensions: 102 mm Height x 70 mm Diameter (4.02" x 2.76")