Optics Ø12 mm lens Beam angle 12° - 35° Material Aluminium Colour Grey Surface treatment Anodised Size Ø21 x 5.5 mm Weight 15 g Mounting Recessed with spring Mounting hole Ø18 mm Built-in height 23.5 mm Min. tail size Ø1 mm Max. tail size Ø6 mm Protection rating IP 44