Hoover 42245030 Bottom Plate, WINDTUNNEL Upright with Power Drive Wind Tunnel Self-Propelled: U6439-900, U6454-900, U6485-900, UH50000, UH50005B, U6432900 Wind tunnel Self-Propelled Bagless: U6630-900. U6634-900, UH60000, UH60010 Wind tunnel self-propelled upright vacuum: U6485100, U6485200, U6485300, U6433900 Upright vacuum: U6425900, U6446900, U6445900, 6451900 Oem #42245030