Click to expand Tap to zoom DeLonghi: O-Ring - round/red (on froth regulator) for BAR-8, BAR-42, BAR-51, BCO-110, BCO-130, BCO-264, CC-100, EC-330, EC-460, ESAM-4400, ESAM-4500, ESAM-5400, ESAM-5500, ESAM-6700 by Delonghi Parts & Accessories Please login to view pricing.