Adult Nasal Cannula Tubing from Allied Healthcare comes with 7 Foot oxygen tubing that is three-channel crush resistant. This Adult Nasal Cannula is an over the ear style oxygen cannula to provide low flow oxygen with anti-roll guard for better fit, comfort and positioning. Newly designed, the Adult Nasal Cannula has a softer tubing connector for easier fit. This Adult Nasal Cannula has Sure Flow tubing that offers better comfort for long term use. Packaged in easy-open perforated bags. Latex Free.