Kit Fittings Replacement consists of two 5/8″ mini adaptor x stack concentrate connection, two 1″ maxi adaptor x stack Dilute connections, one 1/4″ stack Electrode connection. This Kit allows replacement of nozzles, if they are broken off any MK-3 stacks or any MK-2 series stacks which are built after 2/1/07. Gaskets may be translucent or black.