UST Metric O-Rings - 419-Pc. Set， Model# W5203<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Has O-rings of 1.5， 2， 2.5 and 3.5mm thickness</li><li>Inside diameters from 3-50mm</li><li>Resealable plastic case</li></ul></div><img src="http://ecx.images-amazon.com/images/I/314mSsxzA%2BL.jpg" noproxy>