This TECHSPAN product, identified by part number CM4TNC250F, is a yellow nylon FULMALE connector designed for 1/4 inch applications. While specific details are limited, its construction suggests suitability for electrical connections where a durable and clearly identifiable component is required.The TECHSPAN CM4TNC250F is a yellow nylon FULMALE connector with a 1/4 inch interface. The raw ERP description indicates it is designed for 12-10 AWG wire sizes.