Camco's C-Do2 Clear 45-Degree RV Sewer Hose Adapter allows you to see when your RV sewer system is clean. It attaches directly to your RV's sewer connection and is compatible with 3-inch diameter sewer hoses. This adapter has a 45-degree angled design and features (4) bayonet prongs for easy hookup. It is made of break-resistant polycarbonate.