Hoover Windtunnel Savvy Upright Vacuum Cleaner, U8172-900 Genuine. Height Adjustment Assembly. Used in very good condition. If you need it, I've got it , Good Quality at a fair price. Fits U8172-900,8125,8135,8145,8148,8150,8151,8153,8155,8157,8161,8163,8171,8173,8174,8181,8183,8185,8187,8188,UH40110,40080.