Product parameters: Material:PBT Packing list:5 * conversion lamp head WIDE RANGE OF APPLICATIONS: This B22 to E27 female socket bulb adapter for light bulbs E27 type is a practical lighting fixture. It is widely used at home, office, corridors, exhibitions, workshops, restaurants, hotels, art galleries and other places. GOOD INSULATION PERFORMANCE: The housing of the Screw-in bulb adapter is made of flame-retardant PC, heat and high temperature resistant, anti-aging and good insulation performance. Stable performance, safe and reliable, for worry-free use. EASY TO USE: Simply screw the converter lamp holders into the external socket, which looks like a part of the socket, and the length increases according to the depth of the bass you tighten. Easy to use, it is an essential accessory for home. DURABLE MATERIAL: LED bulb converter with standard nickel-plated iron base, wear-resistant, strong and durable, not easy to deform, long service life. life.