This 4pc brush spring set is specifically designed for the Lucas C40-T generator with tach drive. It is made of durable metal material and is easy to install. The set is a vintage part that is unfinished, making it perfect for those who want to maintain the original look of their vehicle. The set is manufactured in the United Kingdom and is not a universal fitment. It comes with features such as easy installation and durability, making it a great addition to any vehicle. The set is suitable for those who are looking for a reliable and authentic replacement part.