Panduit FSD78-18-D insulated ferrules are designed for single wire containment in terminal blocks. These ferrules conform to DIN color requirements, ensuring proper wire identification and organization. The funnel entry simplifies wire insertion, reducing installation time and costs. The seamless barrel construction prevents loose wire strands, contributing to reliable and long-lasting terminations. Suitable for a variety of terminal block applications, these ferrules offer a secure and efficient solution for electrical connections.