63001-2RS Bearing 12x28x12 Sealed63001 2RS Sealed Ball Bearing 12mm x 28mm x 12mm One Bearing 63001 2RS Sealed Ball Bearing, bearing inner diameter is 12mm, bearing outer diameter is 28mm and bearing width is 12mm, made from durable 52100 alloy steel, commonly known as chrome steel, bearing is equipped with two rubber seals to shield against dust and contaminants, bearing is pre lubricated with grease. 63001 2RS Ball Bearing Deep Groove Ball Bearing Material: Chrome Steell Size: 12mm