Aluminum material, good heat dissipation, no worry about loss of brightness. Spotlights must be durable. Diameter: 105 mm - Installation depth: 33 mm - Mounting hole diameter: Ø 75 mm~Ø 95 mm. Transformer stepped necessary, directly to 230 V, Energy efficient F, With 25,000 hours of life. Complies with CE standards, RoHS certification, anti-electromagnetic interference, quality and safety guaranteed.