The Kitty Pass Cat Door for Interior Door - Cat Hole Kitty Door for Hidden Litter Box - Pet Door for Cats up to 21 lbs - Semi Gloss White Cat Door Interior Door

CATHOLE Wood Cat Door Classic Model - Original Interior Cat Door, Installs Easily, Removable Grooming Brush

PetSafe Never Rust Dog and Cat Door, Small, for Pets Up to 15 lb, Paintable, Easy DIY Installation, Closing Panel Included, Install in Interior and Exterior Doors or Walls, Durable, Adjustable Flap

SureFlap - Sure Petcare Microchip Cat Flap, White, Scans Pet's ID on Entry, Check Your Cat's Size,Flap Opening is 4 3/4” (H) by 5 5/8” (W)

Ideal Pet Products Cat Flap Door with 4 Way Lock, 6.25" x 6.25" Flap Size

PetSafe Interior Cat Door: 2-Way Locking, Indoor Pet Door Flap - Tinted Privacy Door for Cat Litter Box or Pet Feeder, Built-In Door Lock, Durable Door Frame, DIY Easy Install, Hardware Kit Included, Small, White

Cat Door Interior Door - No-Flap Cat Door for Interior Door, Cat Door Interior Door for Cats Up to 20 lbs, Easy DIY Setup, Secured Installation in Minutes, No Training Needed…

Cat Mate 4 Way Locking Large Cat / Small Dog Door

SureFlap-Sure Petcare Microchip Pet Door (White)

MYPET North States 40” Paws Portable Pet Gate: Made in USA, Expands & Locks in Place with No Tools. Pressure Mount. Fits 26"-40" wide (23" Tall, Fieldstone)