American Farmworks Solar Fence Energizer Fence Post Fixed Mounting Bracket Fits American Farm Works Solar Fence Energizers and Chargers Sizes Five Mile, Ten Mile, Eighteen Mile and Thirty Mile. One Size Fits All Of These: 5 Mile Solar 10 Mile Solar 18 Mile Solar 30 Mile Solar This is a fixed mount set at 45 degrees to make maximum efficiency of the sun without adjusting every season. Designed and manufactured right here at Black Barn Creek Farm Supply in the 🇺🇸🇺🇸 I am an engineering student at Purdue University. Let me know if you have any questions. Thanks!