Osculati chromed brass deck filler fitted with special opening system that avoids the use of keys, coins or any other opening devices. Designed to cover the flange completely, thus improving its watertight features. Version fitted with straight or 30° sloped join pin. The sloped type is to be used when the fuelling surface is loped, in accordance with ISO 8099/1 Standards. Fitted with small internal chain, 88 mm max diameter. RINA type-approved. The Waste type Straight long neck design is complying with ISO 8099 standards.