A movable contact arrangement suitable for use in a switching device has a rigid contact body and a flexible conductor piece connecting the contact body to a fixed conductor. These compounds are useful as inhibitors of TCR-Nck interaction in T lymphocytes. A valve member is disposed in the valve housing and is movable along a valve axis. The fishing float can be easily and quickly attached to fishing line, or removed from the fishing line, without damaging or impairing the fishing line. The invention relates to the removal of product carriers from the cabinet and the introduction of product carriers into the cabinet, by making use of a filling station.