**This item has been discontinued by the manufacturer, Greenbrook. The closest alternative is the Clear Polycarbonate Bulkhead with Aluminium base from Knightsbridge - Available Here** The BHEAD, Clear Glass Bayonet Cap Bulkhead by Greenbrook with Grey Aluminium Base and Clear Glass Cover is ideal for both internal and external use. Impact and Corrosion Resistant makes this bulkhead an ideal lighting solution for your property Aluminium Metal Base. Clear Glass Cover. Comes with a B22d Procelain Lampholder and to fit standard Bayonet Cap Bulbs (B22) or CFL equivalent. Heat resistant sleeve is provided to sleeve incoming live cables. Preformed 20mm Cable Entry Knockouts. IP65 Rated (Dust Tight and protected against Water jets) 230V Dimensions: 240mm(H)x130mm(W)x110mm(D) Comes with a 1 year manufactures warranty from the manufacture. Instruction Manual/Specification Sheet To complete the installation of this bulkhead you may require 1.5mm 3 Core White Flex.