Designed for outdoor weather where resistance against falling rain, ice formation, and UV degradation is important to ensure operation of apparatus inside enclosure. Maintains a UL Tested NEMA Type 3R seal against enclosure without need of a rainhood Patented “Click & Fit” design provides a hardware free installation! Plastic made from strong, heat resistant (ABS-FR), UL 94 VO fire approved material Fluted filter-mat provides longer service life, holding more dust before impeding airflow extending the mean time between maintenance for outdoor enclosure; especially critical for those located in remote areas. Offered in Light Gray (RAL 7035) and Black (RAL 9011)