UNIVERSAL COMPATIBILITY - The round electric cable hatch cover is suitable for 30 amp and 50 amp power cords and plugs, replacing any round hatch. SIMPLE INSTALLATION PROCESS - Follow these easy steps: Use a hole saw to create a 3-2/3Inch hole in the wall. Insert the cord from the backside of the hatch, applying water- materials such as butyl tape, putty tape, caulk, or silicone sealant at the flange back before installation. Secure the hatch in place by screwing in 3 bolts. HIGH-QUALITY PP MATERIAL - Engineered to endure the elements, our electrical hatches are constructed from premium PP material. This ensures their durability, resistance to fading, and -free performance while effectively covering your electrical cords. VERSATILE APPLICATION - Essential for RVs, campers, and trailers, this power cable hatch safeguards connections with generators, plugs, sockets, and more, ensuring a dependable and secure power supply. Constructed from PP material, these hatches are water, acid, and UV-. Colour:Black Material:Plastic Package Contents: 2 * RV Hatch Covers 6 * screws Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.