It confines your pet safely using an upper/lower locking system. Plus, the gate locks automatically when the door is released at 45 . Because the Expandable Walk-Thru Pet Gate is designed without a U-shaped frame, it allows you to walk through easily and safely when used at the top of a stairway opening. It attaches securely to wall surfaces/openings from 31.5 € to 47.2 € wide Gate Door expands up to 47.2 € wide and fits beautifully in any home interior! nIts beautiful hardwood construction complements Richell's other fine wood pet products. Available in a rich, dark finish €“ Coffee Bean. Permanent assembly required. Designed by Richell Corporation, Japan. Gate Door locks automatically when released at 45 . Hassle-free design allows safe and easy passage. Beautiful hardwood construction. Assembly requires attachment to wall surface for safety. nGeneral Product Information Recommended for medium size dogs 17.6 to 44 lbs. 8-20kg . Instruction manual included. 1.9 space between wood spindles. Wood spindle size is 5/8 €. 1.75 space between floor surface and bottom of Gate Door. Made from eco-friendly, sustainable bamboo. Features n Width 31.5 to 47.2n Height 32.3n Bar Spacing 1.9n Mounting option pressure mountedn Gate Door expands up to 47.2 € widen Gate Door locks automatically when released at 45 degreesn 1.75 space between floor surface and bottom of Gate DoorItem Details n Dimensions 31.5 47.2 x 2 x 32.3n Color Bamboo