Dyson AirWrap Barrel Curl Attachments Blue and Gold 1.6 inch Airwrap™ barrels First generation 1.6 inch Airwrap™ barrels use the Coanda effect to create loose curls or waves in shorter hair. Comes with two barrels to create curls in in both directions. Dia 1.6" x H 5.29" Pink and Silver 1 inch Airwrap™ barrels 1 inch Airwrap™ barrels use the Coanda effect to create tighter curls. Comes with two barrels to create curls in in both directions. Dia 1." x H 7.25"