<p>The Ambu Perfit ACE extrication collar, actually adjusts to any adult size neck with 16 settings as well as the four standard adult sizes. The Perfit ACE incorporates latches which allow the rescuer to size the collar according to the victim's exact neck size. Two safety buttons hold the collar in place for maximum reliability.</p> <p><span style="color: #ff0000;">16 adjustable settings</span><br /> Stores completely flat<br /> Incorporates the Perfit numbering and color sizing system<br /> Horizontal sizing line<br /> Flip chin piece for easy airway access<br /> <span style="color: #ff0000;">Radiolucent, CT, and MRI compatible</span><br /> Safety buttons allow for maximum reliability Nasal cannula holders located on collar body</p>