Andis 3/4" Nano-Silver Tourmaline Pro-Rod Curling Iron... Nano-Silver technology with real silver has anti-bacterial properties; Tourmaline crystals, crushed from precious gemstones, emit negative ions that quickly seal the cuticle and eliminate frizz for smoother silkier hair; Ceramic barrels preserve moisture, creating incredible luster and shine; Contoured handle for easy control; Heats to 400 degrees F; 20 variable heat settings for all hair types; Fast 30 second heat-up; Lets you flip, shape, control and smooth hair; Tangle-free swivel cord; Safety cool tip; Auto shut-off.