Nonmetallic Enclosures for 22mm Operators• Temp. range: -40° to 280°F Rated IP66 NEMA rated 4XTo maintain 4X rating a UL NEMA 4X device must be used with the enclosure. Made of impact- and corrosion-resistant Valox® crystalline thermoplastic polyester. Molded internal bosses for back panel, component mounting, and DIN rails. Silicone gasket; no hinge. Cover and base meet with tongue-and-groove design for tight seal. Include nonmetallic cover screws.UL Listed and CSA Certified.