Avanos BALLARD Closed Suction System Double Swivel Elbow, Box of 20 - All TypesAvanos BALLARD Closed Suction Systems are available in a wide range of both dry and WET PAK (Saline Vials) options: Standard, Double Swivel Elbow, which feature dual swivels that provide flexibility without multiple connectors T Piece Directional and Dual Lumen styles Available in both Endotracheal and Tracheostomy lengths with catheters numbered allowing the clinician to limit the distance of catheter advance.