EXTRA LARGE JUNCTION BOX - Rectangular plastic outdoor junction box measuring to be 11.8" x 9.8" x 4.7" interior of 11.6 x 9.6 x 8.1 outer width 10.1 outer length. WEATHERPROOF - This waterproof junction box keeps wind, rain, snow, and dirt out, keeping electronic components clean and dry. Use Indoors and outdoors, electrical, ethernet, ham radio, communications, electronics and utility equipment. ENCLOSURE CONTENTS - This outdoor waterproof electrical box is made from anti-corrosive ABS plastic, 12 rubber gaskets with 2 spare gaskets inside to help keep out dust and moisture. CABLE FITTING - Each cable entry hole measures to exactly 1.4 or 36 mm in diameter. LIFETIME REPLACEMENT WARRANTY - Iron Forge Cable stands behind all of electrical boxes 100%. If anything ever goes wrong with this all weather extension cord, we will replace it with a new one.