Applies to the mfg. of mirrors that range from pocket size to wall panels of varied types. Contemplates the reconditioning of old mirrors. Applies to the mfg. of custom glass items such as video game tops, glass used in microwave ovens, electronically controlled cabinets and display panels. Codes 4130 and 4131 shall not be assigned to the same risk unless the operations described by these classifications are conducted as a separate and distinct business.