These yellow winged electrical wire end connectors are a practical and efficient solution for various wiring tasks. Made from durable plastic material, these connectors are UL/CSA certified for safety and quality assurance. With a bulk pack of 500-pieces, this collection of twist-on wire connectors is ideal for homeowners, engineers, and professionals handling multiple wiring projects. Designed for 18-10 AWG wires, these connectors feature double wings for enhanced grip and control. No need for pre-twisting, soldering, or electrical tape. Simply insert your wires into the connector and twist to secure. These connectors are perfect for those who want to complete wiring tasks quickly and efficiently without additional tools. Designed to hold wires firmly, these wire caps offer a secure and long-lasting connection. They are also reusable, making them an eco-friendly and cost-effective choice for ongoing projects. The yellow color coding helps you quickly identify the connector size, simplifying hundreds of wire combinations and saving time in selecting the right connector for the job. With 500-pieces in a convenient poly bag, this pack ensures you'll have enough connectors for both small and large projects, minimizing the need for frequent reordering. Your satisfaction is a top priority, and if you're not completely satisfied with these connectors, you can count on a full refund or replacement for your peace of mind.