Guide profile combination (101, 102; 101', 102') for a window having a roller shutter box having an inspection flap on the outside of the building, at least comprising: - a mounting profile (110; 110') which is formed as a plastics-material hollow section and is to be connected to a cover frame or a central post; and - a first guide rail profile (120, 120') of aluminium, or a second guide rail profile (130; 130') of aluminium, which has in each case at least one guide rail (121; 121', 131, 131') for a drape, wherein the mounting profile (110; 110') and the respective guide rail profile (120; 120', 130, 130') are able to be latched to one another, characterized in that the mounting profile (110; 110') in a profile portion specified for resting on the cover frame or central post has at least one additional guide rail clearance (111; 111') for a second drape; wherein, while using the first guide rail profile (120, 120'), the additional guide rail clearance (111; 111') of the mounting profile (110; 110') is covered by a profile leg (122, 122') of the first guide rail profile (120; 120') that adjoins the guide rail (121; 121') or, while using the second guide rail profile (130, 130'), the U-shaped profile region of an additional guide rail profile that laterally adjoins the second guide rail profile (130, 130') without gaps and forms an additional rail, is able to be pushed into the additional guide rail clearance (111; 111'), and wherein the lateral visible faces of the mounting profile (110; 110') that face away from the cover frame or central post are completely covered by the first guide rail profile (120, 120') or the combination of the second guide rail profile (130, 130') and the additional guide rail profile (140, 140'). - a mounting profile (110; 110') which is formed as a plastics-material hollow section and is to be connected to a cover frame or a central post; and - a first guide rail profile (120, 120') of aluminium, or a second guide rail profile (130; 130') of aluminium, which has in each case at least one guide rail (121; 121', 131, 131') for a drape, wherein the mounting profile (110; 110') and the respective guide rail profile (120; 120', 130, 130') are able to be latched to one another, characterized in that the mounting profile (110; 110') in a profile portion specified for resting on the cover frame or central post has at least one additional guide rail clearance (111; 111') for a second drape; wherein, while using the first guide rail profile (120, 120'), the additional guide rail clearance (111; 111') of the mounting profile (110; 110') is covered by a profile leg (122, 122') of the first guide rail profile (120; 120') that adjoins the guide rail (121; 121') or, while using the second guide rail profile (130, 130'), the U-shaped profile region of an additional guide rail profile that laterally adjoins the second guide rail profile (130, 130') without gaps and forms an additional rail, is able to be pushed into the additional guide rail clearance (111; 111'), and wherein the lateral visible faces of the mounting profile (110; 110') that face away from the cover frame or central post are completely covered by the first guide rail profile (120, 120') or the combination of the second guide rail profile (130, 130') and the additional guide rail profile (140, 140').