10x E40 to E27 socket adapter. This accessory allows you to convert E40 socket fixtures to accept E27 bulbs, eliminating the need to modify existing installations. Simple to use: Screw the adapter into your light fixture with an E40 socket, then install an E27 bulb. Set of 10: Includes ten adapters for multiple conversions, ideal for upgrading several fixtures. Fire retardant: Made from flame-retardant PBT (polybutylene terephthalate) material, providing durability, insulation, and heat resistance. Compatible with all E27 bulbs, including LED, halogen, energy-saving, and smart lighting systems. Easily adapt your current fixtures to use standard E27 bulbs. Reduce waste: Avoid discarding bulbs or fixtures due to mismatched sockets. Convert E40 to E27 and use your preferred bulb type.