30BD4718 2-Row Ball Bearing 30x47x18mm - Sealed30BD4718 Double Row Sealed Ball Bearing 30mm ID x 47mm OD x 18mm Width The 30BD4718 is a compact double row sealed ball bearing ideal for automotive air conditioning compressors and other medium duty machinery where high durability and protection from contaminants are needed. Its sealed design helps retain lubrication while keeping out dust and moisture. Item: 30BD4718 Ball Bearing Type: Double Row Sealed Ball Bearing Closures: Two Rubber Seals