Great Material: Our light socket end caps are made of high-quality plastic, which is durable and long-lasting. Designed with a knob for easy installation and removal. Compatible Feature: These light bulb socket cover caps are compatible with 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. Ideal for use in various settings, 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 accessories are not included. Please note: Slight color variations may occur due to lighting conditions and screen display differences. This does not affect product quality. Measurement error allowance: +/- 1-3 cm.