The product is a set of rear back differential diff gearbox cases for a 01-04 Honda Foreman Rubicon 500 ATV. Made of aluminum and designed with a bolt-on mounting style, these silver cases are compatible with the specified Honda model and years. The manufacturer part number is 41300-HN2-000, ensuring a perfect fit for your ATV. Upgrade your transmission and drivetrain system with these reliable and durable gearbox cases from Honda.