Rail Hangers are tent rail hanging brackets for hanging LightRail® 3.0, 3.5, 4.0 and 4.2 rails. Simply the easiest solution for hanging a LightRail® in a grow tent or greenhouse. These are recommended for use with one piece rails. Rail hanger brackets are compatible with tubing structures up to 1.5 in in diameter. They are packed 4 per package.