The John Bunn Jackson Improved Tracheostomy Tubes by Graham Field are high-quality, permanent-style airway solutions manufactured from medical-grade stainless steel. These "Improved" models feature a new style rotating lock with no protruding parts, ensuring the inner cannula remains securely in place without snagging. Each set comes complete with an outer cannula, inner cannula, and an obturator for safe insertion. These non-fenestrated tubes have a flush-cut distal end and a standard 90° curve, providing a durable and easy-to-clean alternative to disposable plastic tubes.