Right out of the box, it can be installed in a matter of seconds, comes completely assembled, no tools needed! The sturdy American sustainable wood frame surrounds diamond mesh panels that adjust to fit openings from 26.5 to 42 inches wide and is 23 inches high. The side bumpers on this gate are made of rubber and will not mark walls. Safety and containment all wrapped up in one gate – how simple. Wideth: Adjusts to fit 26.5 - 42 inches wide Height: 23 inches Bar spacing 2.25 inches Pressure mounts instantly and securely without hardware Sturdy frame surrounds diamond mesh panels