The product is a set of four Autolite Racing Spark Plugs, specifically designed for use in the AGP501C, 5820, 41R02, and 295 models. These spark plugs are known by the interchange part numbers AR3932, NGK 5820, NGK Denso S517, Champion Spark Plug 295, Jeep 5820, Jeep 41R02, Champion Bosch 86-44, Jeep 295, and Jeep AGP501C, as well as ACDelco 41R02. The plugs have a length of 3.380 inches and are not considered vintage parts.