Killark LZ2S40201 - NEMA 4X & IP66 rated stainless enclosure with Lexan® impact resistant polycarbonate lens. Two 3/4” NPT stainless hubs - one at each end (includes aluminum 3/4” close- up plug and two 3/4” x 1/2” reducers for maximum user flexibility). Two 1/4” - 20 stainless bushings furnished in top of fixture for threaded rod. The LZ2N Series Fluorescent Linear luminaires are designed for installation in high bay and low bay applications. This fixture is made with a 316 stainless steel housing that is suitable for harsh and hazardous environments. - Class I, Division 2, Groups A, B, C, D - Class I, Zone 2, Groups IIC, IIB, IIA - Class II, Divisions 1 & 2, Groups E, F, G - Class III, Divisions 1 & 2