The invention relates to a set of devices (50) containing at least two devices (1, 52, 53, 54) for routing lines, pipes and / or cables through a building part, each containing a housing with a housing wall, wherein the housing has an axial passage channel which is delimited by the housing wall, extends in the longitudinal direction (L) and has an opening (12) at each opposite end (10), wherein the devices have a length (L1, L2, L3) in the longitudinal direction (L) and each have a rectangular cross section, which is arranged perpendicularly to the longitudinal direction (L), with a width (B1, B2, B3) in a transverse direction (B) and a height (H1, H2, H3) in a vertical direction (H). A first device (1, 52, 53, 54) has a first width (B1), a first height (H1) and a first length (L1), and a second device (1, 52, 53, 54) has a second width (B2), a second height (H2) and a second length (L2). A ratio of the second height (H2) to the first height (H1) is n1:x1, wherein n1 and x1 are from the set of natural numbers and are not identical, and / or a ratio of the second width (B2) to the first width (B1) is n2:x2, wherein n2 and x2 are from the set of natural numbers and are not identical. The at least two devices (1, 52, 53, 54) can be detachably connected to one another.