Stifneck Select Extrication Cervical Collar Preformed Adult One Size Fits Most One-Piece / Trachea - EachAbout Stifneck Extrication Cervical Collar, One Size Fits Most (1 Unit) Locks ensure selected sizes stay in place Adjustment tracks ensure symmetrical alignment of size Uses the same sizing and application method as the original Stifneck collars Easy access for pulse checks, advanced airway procedures, and visualization through oversized trachea hole Room for large fingers to slide through the rear panel opening for cervical palpation Directions