Includes seal and nut As an essential part of your kitchen machine’s ability to mix inside the main bowl the housing of the Planet Hub Cover must be working correctly. Use this genuine Planet Hub Cover to ensure that the cover for the socket which holds the beater hook or whisk works correctly protecting the drive system from moisture and food that can get thrown up during mixing. A rusted or warped nut/ hub could also cause your machine to jam not spinning the beater around the sides of the bowl damaging your drive system and critically damaging your machine’s mixing function. Please check the model fit list to ensure that this part is correct for your model.