Control Your / Cricothyrotomy. The Control-Cric System includes the Cric-Knife,M and Cric-Key™. The Cric-Knife has a 10mm long dual sided blade with an integrated sliding tracheal-hook*. The Cric-Key has a pre-shaped stylet that provides airway confirmation with tactile feel of the tracheal rings, along with a 5.5mm soft tube with cuff. Part No. Product Description Case/Qty. 31 3-4565 Control-Cric Training System (Non-Sterile), Not For Human Use 10 313-4567 Control-Cric International Military System (Sterile) 5 31 3-4568 Control-Cric International Military Training System (Non-Sterile), Not For Human Use 10 For more information about our complete line of ventilation products visit our website at www.pulmodyne.com or call 317.246.5505.