Fangrui Product Details 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