Flex-a-lite 5537 Thermal Fan Clutch<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>.63" (5/8") and .75" (3/4") pilot holes</li><li>2.33" flange circle</li><li>3.33" (3 1/3") overall height</li><li>Engages at 180 degrees at about 70% and disengages at 160 degrees at about 30%</li><li>One year manufacturer warranty</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51lt7brLrYL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/81FsE8L00uS.png" noproxy>