Review on Flow Security Systems VersaLock Vented Locking Fuel Tank Cap for Transfer Tanks & Above Ground Commercial Tanks: Theft Prevention & Secure Fuel Tanks - No Adapter Included (FSS 754) by Brian Quenzer

My original cap with my truck's extra fuel tank fell from above, obvious defect. I took a chance and ordered it and saw right away that my original was missing a crucial component. I filled my auxiliary tank to the maximum and operated it in such a way that it deliberately exposed every defect and still no leaks and the lid closes and opens according to the manufacturer's specifications.