LUMINAIRE: In L-2520 cast aluminium. The closure is a 4 mm thick circular armoured glass, with a rubber profile and secured to the screen by five stainless steel staples. STAND: Made out of a 4 mm thick DIN 2440 steel tube, 3" in diameter, all protected by a rust-proof coating (dichromated). NUTS AND BOLTS: In A4 stainless steel.