This is a genuine OEM AQ270 Sterndrive Outdrive Transom Bar Zinc Anode from Volvo Penta. It is compatible with various models such as Camp, Reliance, Sierra, and more. The part number for this item is 832598 and it is also known as CM832598Z, 832598-7, Sea Shield M-832598, Martyr CM832598, Electro Guard V-598, and Volvo Penta 873179.