Shiley Tracheostomy Tube Inner Cannula, Fenestrated, Size 4 (4.0mm), Disposable, Each

This is a disposable, fenestrated inner cannula designed for use with Shiley size 4 tracheostomy tubes. It features a 4.0mm inner diameter and is intended for single-patient use to maintain airway patency and facilitate secretion management. The fenestrations allow for speech when used with a speaking valve, as clinically indicated.