The HALO H450FR2ICAT (4-inch) and H750FR2ICAT (6-inch) are fire safe new construction housings for use with LED integrated trims or modules. This product is fire rated in accordance to UL 263 for up to 2 hours of protection from the passage of flames and toxic gases into ceiling plenums. Suitable for use in multi-family and mixed-use applications requiring up to 2 hours of protection.