The standard universal Pumpout Nozzle comes attached to a 1.5" Male NPT adapter so it can be permanently screwed into a 1.5" ball valve. 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). Whether the deck fitting cap is Metric thread, British Pipe thread or National Pipe thread, this nozzle will work. Made of molded neoprene, the part is extremely durable while maintaining the flexibility required for air tight seals.