Rinnai 224077PP 45 Degree Condensing Vent Pipe Elbow， 2-Piece<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Engineered especially for gas appliance venting</li><li>Positive fit and lock allows for installation assurance</li><li>Two layers of pipe equals two layers of protection</li><li>Seals at every joint expand and contract with weather and temperature changes， so there's no flexing or cracking in the venting</li><li>No flammable， messy or harmful glues， cements， or solvents are used</li></ul></div><img src="http://ecx.images-amazon.com/images/I/21nr%2BjindjL.jpg" noproxy>