Detailed Product Description Recessed Downlight:Code Specification Dimension(mm) Cut-out(mm) Socket H D101120040001 2" 100 Φ80 Φ70 E27101120040002 2.5" 105 Φ102 Φ80 E27101120040003 3" 110 Φ112 Φ95 E27101120040004 3.5" 138 Φ125 Φ105 E27101120040005 4" 160 Φ140 Φ120 E27Zinc alloy trim, aluminium reflector, steel frame, satin nickel finish. White, gold, chrome option.