Rx7 Superlite Advanced Ionic 1 Inch Ceramic Flat Iron, Silver/Black, 8 Ounce Review Posted on July 17, 2018October 26, 2018 by Paparazzombie Can be used to curl, straighten or had waves Promotes shiny, smooth, silky hair Promotes even distribution of hair More Rx7 Flat Irons are an advanced ionic styling tool that can curl, flip, style, and straighten hair.