The product is a set of 50 brand new Lionel TC 22 Knuckle Springs specifically designed to repair Lionel couplers on Lionel trucks. These springs are from the Post War era and are grading at C-10 Mint, meaning they are in excellent condition. They are made for O gauge model railroads, making them compatible with a variety of Lionel trains. These high-quality springs will ensure smooth and secure operation of the couplers on your Lionel trucks, allowing for a seamless and enjoyable model railroad experience.