Specification - MC-12D - Double, Vertical, Adjustable Water Closet Carrier MIFAB Series MC-12D double, vertical, adjustable water closet carrier with lacquered cast iron fitting, 4" (102) no hub waste and 2" (51) no hub vent connection, lacquered cast iron gasketed adjustable faceplates, universal floor mounted cast iron foot supports, adjustable 8" tapered thread ABS nipples with integral test caps, neoprene bowl gaskets, hardware, threaded rod protectors and polished chrome plated finishing cap nuts.