The cardinal gates auto-lock baby gate model mg15 is a gate for high traffic areas. At 29.5" tall, this gate is able to close off openings from 26.5" to 40.5" out of the box, with optional 10.5" and 21.75" extensions models bx-1 and bx-2, sold separately to increase the span up to a maximum of 62.25". Available in either white or black.