Babyliss Pro TT Tourmaline 500 5/8 inch SPRING Iron BABTM5058S - - has a tourmaline/ceramic barrel. You can select the perfect temp for your specific hair type with the temp dial that allows you to select 1 of 40 heat settings. The BaByliss Pro TT Spring Curling Iron features a tourmaline barrel fused with ceramic. Tourmaline is a natural source of negative ions & far infrared heat, which provides faster styling. Negative ions eliminate frizz & close the cuticle to create smooth, shiny hair. Far infrared heat easily penetrates hair for faster styling with less damage.