Designed to be used with MAC Blower Packages the intake air filters have a 99+% removal efficiency to 10 micron. These filters are built to last from durable carbon steel with a baked enamel finish and feature interchange-able elements. They can handle continuous temperatures from -15° to 220° F. The fully drawn weatherhood contains no welds that could rust or vibrate apart. With a low velocity air gap between base and cover and a center bracket located for minimal flow restriction these filters deliver worry free performance.