Abstract: The present invention relates to a base part comprising a cannula device for use in delivery devices delivering medication to a patient under controlled conditions, and an inserter device for insertion of the cannula device in the base part. The base part comprises a receiving portion (7) for a cannula device (1), a portion (9) which can be placed on the skin of a patient and attachment parts (11) for a delivery part comprising at least a reservoir (13). The base part further has a connection transferring fluid from the reservoir (13) to the base part which connection can be provided at different angles relative to the base part (9).