All frames are supplied with two pairs of numbered universal mounting rails, levelers, a bag of 40 M6 clip nuts with screws and casters to make moving the frame easy. Two other standard widths are 24” and 26”. The 24” is a straight 19” rack mount server cabinet. The 26” version can be used for 23” and or 19” rack mount. Universal rails can be provided that are reversible and have a 19” rack mount one side and a 23” rack mount.