Univen Blender O-ring Gasket Seal Replaces KitchenAid 9701859 9704204 WP9704204 Replacement blender Jar Gasket Seal Fits KitchenAid blender models that begin with 4KSB5, 5KSB5, KSB3, KSB5 Size is approximately 62mm ID and 82mm OD