The stainless steel jet nozzle disc will press-fit into the center of the block and be held down by the top. The nozzles are made from 1/16th" OD capillary tubes with 0.0325" ID. All but the upper 1/8" of the nozzles OD will be milled down to 0.0425 OD to fit into the matching cups in the base
52 outlets total, and yes it will be super restrictive. But it is an optional part.
