RV Sewer Hose Adapter Fitting | Features 4 Bayonet Prongs, a Heavy-Duty Polycarbonate Construction, and is Compatible with 3-Inch Diameter Sewer Hoses Clear RV Sewer Hose Adapter: See-through hose adapter allows you to see when your RV sewer system is clean Compatibility: Fits 3-inch diameter RV sewer hoses Features: Angled 45-degrees Easy to Install: (4) bayonet prongs provide easy hookup Durable Construction: Made of break-resistant polycarbonate