This article contains the HD440UK / HD420UK Series Shark FlexStyle™ Air Styling & Drying System FAQs. This supports the following models: HD432EMUK, HD436SLUK, HD437SLUK, HD446UK, HD446SLUK, HD440JBUK, HD440JSUK, HD432VPUK, HD432PKUK, HD440UK, HD420UK, HD440SLUK, HD450TLUK, HD440BPUK and HD440PLUK. Please note this also supports the refurbished models HD440UKREF, HD440UKREFB.