Cold rolled steel, painted or brushed stainless steel housing, Opal clear polycarbonate lens, lifetime warranty, 4" nominal width, 3.75" depth, 2', 3', 4', and 8' lengths, Continuous row utilziing end Kos, 16 ga. steel housing (FVSP) for durability. 18 ga. steel FVSM std., Internal occupancy sensor available, Damp location standard, wet location under covered ceiling available, Matte white paint standard; gloss white & anti-microbial available