FEATURES•Type 316 stainless steel. Hand polished andelectropolished to protect against corrosion.•Each deck fill is marked with either: Diesel, Water or Waste.•Diesel deck fils come with a stainless steel tang for easyattachment of grounding wire.•Each deck fill (las an o-ring gasket for tight seal.•Your choice of deck fil cap: sailing yacht type which opens withany standard winch handle or power type which opens with key.