A flanged ball bearing is not truly a different type of bearing.Just as ball bearings are offered sealed or open, they are also available flanged or plain.The flange is just another option given to the design engineer by the bearing manufacturer.A flange is an extension, or a lip, on the outer ring of the bearing, designed to aid the mounting and positioning of a bearing in a delicate or problematic application.TECHNICAL SPECSItem: F695RS BearingType: Flanged Deep Groove Ball BearingClosures: 2 Rubber SealedLubrication: With GreaseFlanged Side: 15 mmID (inner diameter)/Bore: 5 mmOD (outer diameter): 13 mmWidth/Height/thickness: 4 mmcolour: silverMaterial: steelPackage Contents:30 x F695-2RS BearingOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.