... end technology 4.Open;Seal;Shield DEEP GROOVE BALL BEARING R3AModel No: Inch Bearing R3A1.Certificate: ISO9001: 2008;ISO14001:20042.Material: ... No.1:About the products: Product Name: Deep groove ball bearing R3A Dimension And Parameters Bore (d)mm inchOuter diameter ( ... ,6700 series,6800 series,6900 series,16000 series, and bearing cage.Quality GruanteeYou can replace or refund the products because ...