Perfect Pet Multi-Flex Pet Door, Medium, 6.38" x 11.25" Flap Size

The Perfect Pet Multiflex Pet Door features a strong plastic frame with a 3-part flexible dual pane flap. The segmented flap allows pets to only open as much as they need for maximum energy efficiency. Installation is easy! 3-part flexible dual pane flap for maximum energy efficiency Spring-loaded locking slide for one-handed use Easy, secure installation The inner telescoping frame adapts to doors of 1.25"-1.75" thickness. A spring-loaded locking slide allows easy, one-handed use, and the durable design requires very little maintenance.