Brand new product! This fitting is installed to the vent line and acts as an intermediary between the fuel tank and the Vapor Trapper™. In the event you have a full tank and you come to a sudden stop, this well help prevent any gas from jumping up inside the vent line and working it's way to the filter. This is good for installations that don't have a ton of clearance for a long vent line. While this doesn't prevent fuel from passing through, this will reduce how far the fuel jumps up and travels into the hose. Enjoy the extra peace of mind of a long lasting, clean filter.