Killark VM4S150 - Ballast tank and splice box – corrosion resistant copper-free aluminum alloy with baked powder epoxy/polyester finish, electrostatically applied for complete, uniform corrosion protection. All external hardware – 316 stainless steel. Guards – painted copper-free aluminum alloy or 316SS for 7-3/4” glass optics and Enclosed Reflectors. Spin-top Refractor Guards are Plated Steel. Reflectors – lightweight, corrosion resistant fiberglass reinforced polyester, or copper-free aluminum. Seven mounting splice box types. Pendant, Flex Pendant, Ceiling, Wall bracket, Cone Top, 25° Angle Stanchion, Straight Stanchion – in a variety of entry sizes, including M20 for the VMX ceiling style. Quartz auxiliary, HPS instant restart, Ballast Protectors. Normally shipped as components for fast delivery, or may be ordered factory assembled with or without lamps. Options for fuses and quick disconnect The VM4 Series is a low bay and high bay HID luminaire. This fixture is made with a cast copper-free aluminum housing and mount 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