Sierra International Lower Seal Kit 18-8359. The kit contains: (4) Sierra 18-7180 O-Rings (1) Sierra 18-7184 O-Ring (2) Sierra 18-2041 Oil Seals (1) Sierra 18-7194 O-Ring (1) Sierra 18-7193 O-Ring and (1) Sierra 18-4259 Washer. The kit is...