Model numbers this fits are from the Duo Clean with PowerFins range and are as follows. IZ300uk, IZ300ukt, IZ320uk, IZ320ukt and IZ390uktq. Item = Black - Press To Unlock Flexology Wand Button. This is a genuine Shark used part, it will have scuffs and scratches, paint, dust dirt etc from daily use, i have tried to show in pictures.
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