The Ambu Mini Perfit Ace extrication collar assists with the maintenance of neutral alignment, prevention of lateral sway and anterior-posterior flexion and extension of the cervical spine during transport and routine care or movement. - A dozen sizes in one collar: Ambu Mini Perfit ACE comes with a comprehensive sizing system for easy and accurate sizing; works for children but also for small adults with thin necks.. Flip chin piece for flat storage and pre-shape to fit the chin, and to facilitate intubation and removal of vomitus from the mouth. CT and MRI compatible, and comes with a ventilated, posterior shell for fluid drainage.