Includes one hallway gate and two extensions. Fits opening from 38 to 42.5 in. without extensions. Pressure mounted. Gate opens in both directions and swings closed automatically. Easy one-handed operation for adults. Warranty: One year. No assembly required. Extensions: 3.5 and 7 in.. 38 - 42 in. W x 2 in. D x 29 in. H (21 lbs.). Very easy to set up and take down! Great for hallways and large openings. Great for pets too!