Specifications: Item Type: Bulb Holder Voltage:100-240V Current:2A Size:53x35mm Material:Metal+PBT+Ceramic Feature: MR16 (GU5.3) male to GU10 Female 5.3mm MR16 to 10mm GU10 This adapter allows you to use a GU10 Light Bulb in a MR16, GU5.3 Lamp Socket Package included: 1xMR16 (GU5.3) to GU10 Light Bulb Adapter