When you install the solar panel cable on your RV or boat? You need to make a cut in the roof of the RV. To avoid making unsightly and potentially leaky cable entries, use the Haoguo Solar Cable Entry Gland to cover the area, making it fully waterproof.Installation steps:1. Clean the position of the solar double cable gland that needs to be installed, and pass the cable on the solar panel from the terminal into the waterproof cover.2. Peel the surface of the 3M waterproof tape at the bottom of the waterproof cover, then pull the cable into the inside of the RV and attach the waterproof cover to the position where it needs to be installed.3. Finally use screws to ensure stability. (The self-tapping self-drilling screw does not need to be punched in advance, it can be fixed directly)Specification:Size: 4.4*3.6*1.57 inchMaterial: ABS plasticSuitable for: All Cable Types 2mm² to 6mm²