WIX Filters - 24801 Heavy Duty Air Filter Service Gauge， Pack of 1<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Includes grommet， mechanical restriction gauge and instruction card</li><li>Engineered with a sintered bronze filter inside the brass fitting</li><li>Constructed from temperature resistant materials</li><li>Reduces filter inspections and needless replacements</li><li>Prevents contamination from airborne vapors or dirt， each monitor is</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31SFFOvJHZL.jpg" noproxy>