Feature 13 Pcs Set: The set contains 3 pcs E27 lamp holder for you, easy to install, with good heat insulation, simple and safe to use. 2Premium Shell: The shell adopts aluminum die casting material, treated by high temperature electrostatic spraying, resistant to high temperature, corrosion and oxidation. 3Standard E27 Interface: Professionally manufactured, the lamp socket interface is standard E27, universal to use. 4Waterproof and Anti Melting: Built in waterproof ring, the heating lamp holder is waterproof and anti melting, safe and reliable to use. 5Adjustment Function: The lamp holder can control the brightness and adjust the temperature of the insulation bulb, maintain good performance of the bulb.SpecificationItem Type:E27LampHolderMaterial: Aluminum, Copper, Ceramic, WireSize: Approx. 5.2x5.2x8cm/2x2x3.1inWeight: Approx. 250g/8.8ozInterface: E27 (delivered without light source)Features: Waterproof, heat insulation .wang-edit-text{ font-family:Arial important; } .wang-edit-text table { border-top: 1px solid 000; border-left: 1px solid 000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid 000; border-right: 1px solid 000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List3 x E27LampHolder (Without Light Source)