This pumpout nozzle is attached to a male 1.5" quick clamp (camlock) adapter so it can be interchanged with other deck adapters. The suction cup-like splash guard not only secures a 4" area around the nozzle, it also aids in providing an air tight hose-to-waste deck fitting connection. The tip for this nozzle is tapered to fit all waste deck fittings with openings from 1.25" (3.18cm) to 2.25" (5.72cm). This nozzle will work, whether the deck fitting cap is Metric thread, British Pipe thread or National Pipe thread. Made of molded neoprene, the part is extremely durable while maintaining the flexibility required for air tight seals.