Description The OPW 1611AV-1620 is a vapor recovery adapter. The 1611AV are poppeted adaptors, designed to mate with a vapor recovery elbow, for returning gasoline vapor to the tank truck during a fuel delivery to an underground tank. Materials Body: Clear anodized aluminum or cast bronze Stem: Chrome-plated steel Stem Guide: Acetal resin Spring: Stainless steel Gasket: Nitrile®