The TankSafe™ ‘Standard’ contains a unique, patent-pending, solid ‘Dome’ base, which sits high in the ‘Standard’s neck, therefore minimizing the amount of fuel that can be siphoned. This means it is the most effective basic anti-siphon at preventing 3rd Party theft compared with other basic devices in the independent tests. Additionally, the 2 inch thick Aluminium base cannot be knocked out, therefore exposing the whole tank of diesel to potential theft. The TankSafe™ ‘Standard’ offers 75% more protection than other basic anti-siphons – see our independent test results.