Automatic fan thermal switch for automatic operation of fireplace - woodstove fans 115V<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Switch closes at 115°F (43°C) (turns on fan)</li><li>115 Volt Operation</li><li>1/2" Disc</li><li>1.25" center to center on bolt holes</li><li>2 Stake on Terminals</li></ul></div><img src="http://ecx.images-amazon.com/images/I/312Yk4RJQ9L.jpg" noproxy>