Petsafe - Staywell Original 2-way Cat flap - M (740EF)

Easy installation - Simple DIY project to install; optional tunnel extension made for thicker doors and walls (sold separately for the small size pet door)Closing panel - The 2-way pet door provides pet parents the option of snapping on a closing panel from the inside for convenient control over their pet’s coming and goingUniversal Fitting - Works with brick walls, and wooden, metal or PVC/uPVC doors; includes simple cutting template and installation guideLong-Lasting Durability - Includes a 3-year manufacturer’s warrantyFlap opening: 21,8x23,8cmFrame: 29,2x35,2cmCutout in door: 23,7x28,1cmMax shoulder size: <21,8cmUp to 18kg dog