This is the Genuine Advance Actuator 36V DC.Replaces Advance part #56393303.Fits the following models:2800D ST2800D-C ST3400D ST3400D-C STAdgressor 2820D AXPAdgressor 2820C AXPAdgressor 2820CAdgressor 2820DAdgressor 3220C AXPAdgressor 3220CAdgressor...