Disposable inner cannula (DIC) with integral 15 mm snap-lock connector, individually sterile packaged, required for use with DFEN and DCFN. b Spare inner cannula (SIC) with red, color-coded twist-lock connector, for temporary use during cleaning or removal of the inner cannula of Shiley™ tracheostomy tubes, may be used with FEN, CFS, and CFN. c Disposable inner cannula, fenestrated (DICFEN) is for use with DCFN and DFEN tracheostomy tubes. d White 15 mm cap (CAP) attaches to the fenestrated inner cannula with green 15 mm connector to permit breathing through the fenestration and upper airway. e Decannulation plug (DCP) closes the proximal end of the FEN and CFN tubes to permit breathing through the fenestration and upper airway. f Disposable decannulation plug (DDCP) closes the proximal end of the DCFN and DFEN to permit breathing through the fenestration and upper airway.