Genuine Hide-A-Hose 90 Degree Sweep Elbow. These 90 degree elbows are 16” long and provide for the least possible resistance to airflow. Hide-A-Hose installations require these larger fittings to be used in order to have the vacuum hose retract back into the piping smoothly. Most Hide-A-Hose port locations utilize around 2 to 4 of these Hide-A-Hose Sweep 90’s.