Fueling Coupler is our latest version and is approved for competition. The Fuel Coupler is attached to the fuel can using (2) 2.5" hose clamps on the 2.5" fuel line. (2) 1.5" hose clamps attach to the newly added 1.5" ID by 18" vent line that attaches to the 1.5" tube on the fueling coupler. The Schultz AFS-10200 Fueling Coupler is one component of the Schultz Single Point Dry-Break system.