The product is a new Kohler OEM ignition coil with part number 4151921 or 4151921-S. It is designed for use with gas-powered riding mowers, specifically compatible with Kohler engines. This high-quality engine part is suitable for various Kohler models and is a reliable replacement for maintaining and repairing lawn mowers. With a California Prop 65 warning, it is important for customers to be aware of the potential health risks associated with this product.