Great Material: Our light socket end caps are made of high-quality plastic, which is durable and long-lasting. The knob design allows for easy installation and removal. Compatible Feature: These light bulb socket cover caps are designed to fit standard light bulb sockets (E26 sockets). Useful Tools: These light socket safety cap plugs help protect string light sockets from weather damage, preventing water or dust from entering the sockets. They also enhance electrical safety and are ideal for various occasions, including parties. Color: Black Material: Plastic Package Contents: 16 x Light Socket Safety Cap Plugs Note: The package includes only the items listed above; other products are not included. Slight color variations due to lighting reflections or screen display differences may occur and are not considered defects. Measurement may vary by 1-3 cm due to manual measurement.