INNOVATIVE: Patended Auto retractable/fold back system. FLEXIBLE: Fits openings from 21.7" - 35.2" inches. Mounted Height 28" inches.CONVENIENT: Can be angle mounted on the inside and outside of the door frame as well as at the top or bottom of stairs and banisters. Also ideal for tight spaces and doorways. EXTENDABLE: For Doorways 36" inches or wider - MUST Use with BabyDan Guard Me Extend A Guard Extensions 9.4" inches (Model number: BBD-58024-5400)EASY INSTALLATION: Easy to set up. Completely Adjustable. No Trip Bar - Fully Retractable.SAFE & HIGH QUALITY: Made in Denmark. Meets latest safety standards. Fully complies with all current European and US safety standards. 100% PVC FREE.MULTI-PURPOSE: Ideal for kids & pets. Folds back out of sight when not required.