- Four-way locking control: Dual knob-style locks let you choose open, locked, in-only (cat can enter but not exit) or out-only (cat can exit but not enter) to manage when and how pets access your home. - Quiet operation: A built-in brush strip reduces noise when pets use the door. The silent action helps avoid startling animals and prevents disturbance to household members. - Near-invisible on glass: The transparent flap blends with clear glass, so once installed on a window or door it looks seamless. Ideal for installation on clear glass windows and sliding glass doors (also suitable for white screen dog door applications). - Size and compatibility: Flap dimensions are 7.25" x 8". Designed for all breeds of cats and small dogs up to 6 kg / 13 lbs (cat mate glass cat flap compatible size). - Practical control and performance: The combination of selectable lock modes and noise-reducing brush strip gives precise control over pet movements while maintaining calm, unobtrusive use. Use scenarios: 1) Let your cat come and go during daytime while keeping them safely inside at night by switching to in-only or locked modes. 2) Allow a small dog or cat to exit to a backyard or balcony (out-only) without permitting re-entry when desired. 3) Install on a sliding glass door or clear window to maintain a clean visual appearance while giving indoor-only rooms controlled pet access. What you get: A transparent, quiet pet flap with four-way locking and a brush strip for noise reduction, sized 7.25" x 8" for cats and small dogs up to 6 kg / 13 lbs, suitable for clear glass windows and sliding glass doors.