This black pet door from Relaxdays is designed for cats and small dogs, allowing them to enter and exit independently. It features a 4-way locking system: open, in only, out only, or locked. The magnetic closure ensures the door automatically closes after use, and a fabric rim provides insulation against drafts and cold, making it ideal for winter. The outer dimensions are approximately H x W: 22 x 20 cm, with inner dimensions of H x W: 15 x 15.5 cm.