Innovative Products of America 7894 Flexible Compression Whistle<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Insert the flexible whistle alert into any spark plug hole and bump the engine until you hear the whistle blow</li><li>Easily finds top dead center on compression stroke making it quick and easy to use</li><li>Rubber nipple adapts to any spark plug thread size</li><li>Flexible hose allows for reach in tight spaces</li><li>Made and assembled in U.S.A.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31%2BKWDDWnUL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/21S-p0uZaIL.jpg" noproxy>