GU5.3 12v 35 Watt max lampholder. MR11 12v 35 Watt lamp (not supplied with fitting - products codes L22D or L25D). Electrical termination via 10 Amp connector block within secure enclosue c/w cord grip. Dimmable with electronic transformer (not supplied with fitting - see Transformer & Drivers section). Outer diameter 60mm, recessed depth 42mm. Cut-out 42mm. 100mm recommended ceiling void required. Spring clip fixings with a recommended maximum ceiling thickness of 12mm.