The Fremco Cable Gasket, 16 mm (103-10217, Millennium part 513100) seals the blowing head around a 16 mm cable on Fremco MultiFlow jetting equipment, holding duct air pressure steady so the cable rides the air stream through the full run. It ships six per pack, sized to mid-range cable diameters common on distribution fiber routes. A properly matched gasket is what keeps a long blow from losing pressure and stalling partway through. Millennium stocks the complete Fremco gasket size range for other cable diameters on the same blower line.