http://www.VXB.com. The first is the riveted steel cage. This cage is held together by rivets and it made of chrome steel or stainless, depending on the type of steel the bearing is made of. This type of cage is good for high speed applications. The second option is Nylon. The nylon cage is good for low friction. The third option is Bronze. Bronze cages are good for high temperature applications. A bearing with no cage is a full compliment bearing and that is usually found in high temperature bearings, the different Cage Options for a Bearing.