Dixon Bayco VR4050PL Nylon orange vapor recovery cap 100 mm (4 inch)Dixon Bayco VR4050PL Nylon orange vapor recovery cap 100 mm (4 inch) For gasoline, petrol and diesel, up to E100 and B20 biofuels To prevent contamination and fuel evaporation, tank adapters are capped when not in use Centered 'T' handle allows for one handed use and provides a solid locking mechanism Strong and lightweight Built in locking feature Corrosion resistant materials Vapor recovery orange Construction: Nylon colored orange to signify vapor