3.DEDICATED APPLICATION.THE AC Drain Hose Connector Elbow Fitting Kit Well-designed for External Unit for most Mini-Split Unit and Window AC Unit 5.HIGH AND Well designed,, excellent process, rigorously tested, compact & sturdy, & longevou, weather resistant 1.SIZE.15mm / 0.59in AC Drain Hose Connector Elbow with Rubber well-designed for External Unit Drain Hose 2.SIMPLE INSTALLATION Connect terminal to the Outdoor Unit, the other terminal to the Drain Hose 4.HIGHER TIGHTNESS The Connector Elbow is equiped with a rubber-ring, which can perfectly aviod flowing and leaking