Molex Circular Connectors - Accessories 1302011111 are a series of straight closure caps designed for use with 2.50mm pitch circular connectors. These caps are made of black plastic and feature a snap-fit design for easy installation. They are designed to provide a secure connection and protect the connector from dust and other contaminants. These caps are ideal for use in a variety of applications, including automotive, industrial, and consumer electronics. They are also suitable for use in harsh environments, such as those with high temperatures and vibration.