Spectre Performance 4368 Chrome Plated Crankshaft Pulley for Small Block Chevy<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Triple chrome-plated steel</li><li>Single belt groove</li><li>7 In. diameter， 2.5 In. back spacing to center of belt groove-note: identify the water pump by looking at the distance between it and the timing cover</li><li>Made from high quality material</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41LHQsKWGdL.jpg" noproxy>