Mallinckrodt Medical Inc Shiley™ Disposable Cannula Cuffless Tracheostomy Tube 6 Size 74mm L, 10-4/5mm O.D. x 6-2/5mm I.D.Shiley's Disposable Cuffless Tubes provide easy change-outs , thanks to a convenient snap-lock connector, swivel neck plates and a radio opaque outer cannulae of polyvinyl chloride. Each DCFN is fully compatible with the current Disposable Inner Cannula