Beseler 4x5 condenser enlargers use a scale on the right side of the upper bellows assembly for correct positioning of the condenser set for different negative formats. This is the part Beseler refers to as the "Negative Stage Guide" or "Negative Size Indicator Kit". When a colorhead is installed, this scale is typically removed, and thus often lost. Occasionally the scale is accidentally broken off. If you need a replacement scale, this handy kit provides all items required. It includes the aluminum post with the scale, pointer, attachment screws, and installation instructions.