Ratech 500 Marking Compound<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>verify backlash and pinion depth</li><li>make sure your clearances are correct</li><li>By making sure your clearances are correct the long life of a ring and pinion are ensured.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/314MuIdQIdL.jpg" noproxy>