RV sewer hose caps seal both ends of the sewer hose before storage. One cap fits on the bayonet end and the other fits on the end of the 4-in-1 elbow to form an odor-tight connection. Works with RhinoFLEX, RhinoEXTREME, Revolution, and Easy Slip sewer hose fittings. Set of 2. No. 39753: Dimensions: 3-1/2 In. W, Color: Black, Pkg Qty: 2, Package Type: Hang Tag Thanks for shopping Hipp Hardware Plus's Online Store for all your DIY and Home Improvement needs. Remember Hipps Help!