Rusk W8less Professional Ceramic Str8 1″ Flat Iron. Rusk W8less Ceramic Str8 Iron Hair Straightener is a professional ceramic and tourmaline hair straightener used to transform unmanageable frizzy or curly hair into silky, smooth, soft and shiny hair. 1″ ceramic plates ideal for all lengths. Variable temperature control up to 450 degrees F. Recessed On/Off switch. 9′ power cord. Utilizes ceramic technology and far-infrared heat to heat the hair from the inside out, locking in internal moisture. Ceramic plates infused with tourmaline emit negative ions.