The Pet Life Porta-Gate travel collapsible and adjustable folding dog and cat gate work with various door openings. It easily collapses and rolls up to take up very little storage space. The side poles easily extend and grip onto any door posts or openings. Simply twist the polls and watch the gate automatically extend and adjust to the proper width settings. The mesh and polyester entrance door simply zips open. It is short enough to step or walk over and tall enough to prevent smaller dogs and cats from passing through. For door openings 23-3/4" to 35-1/4".