The NAC-1O is a combined set of CK-1 (Chamber Dish), CK-1A (Adaptor Plate for CK-1: for ITS or Olympus microscopes), and CAT-1 (Tube Clamper). The magnetic CAT-1 (set of 5) can directly attach to the CK-1A, thereby helping keep the perfusion tubing uncluttered and tangle-free.