Spectre Performance 4438 Chrome Plated Crankshaft Pulley for Small Block Chevy<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Double belt groove</li><li>7 inch diameter</li><li>Identify the water pump by looking at the distance between it and the timing cover， long water pumps are about 1 In. away from the timing cover</li><li>Triple chrome plated steel</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41BZpaIu5GL.jpg" noproxy>