The present invention relates to a kit comprising at least one base plate for adhesive attachment to the skin around at least one body opening. The kit further comprises at least one separate peripheral device for attachment to the base plate. The base plate comprises a backing layer, having a proximal side facing the user during use, where a skin friendly adhesive is disposed on said proximal side of the backing layer and wherein the base plate is an intact base plate thereby allowing a hole to be cut at a desired position before use. The separate peripheral device comprises a continuous adhesive ring for permanent adhesive attachment between the continuous adhesive ring of the peripheral device and the distal side of the backing layer of the base plate. This allows the user to provide a custom fit for irregular body openings.