modname=ckeditor Pet Screen Door Home Lockable Cat Screen Door Plastic Pet Dog Door for Mosquito Proof Screen Window Security Flap Gate Dog Fence Selling points: 1. Roller type activity door, open the door easily and flexibly 2. Fold-resistant plastic, 2 directions in and out at will 3. The style of the field grid, black and white two-color optional 4. Simple installation, dogs and cats to become more convenient access, free from mosquitoes and insects Material: plastic Size: small: outside size: 29cm / 24cm / 1cm; inside size: 25cm / / 19.7cm (for small and medium dogs, cats with) Large: 45.5cm / 35.5cm / 1cm; inner size: 40cm / 30cm (for medium and large dogs) Installation steps: 1. Put the screen door down and put it flat, the cat screen door divided into two pieces 2. Install in the lowest corner of the screen door, then the cat screen door before and after the clamping screen mesh, press the cat screen door pin buckle, clamping screen mesh 3. Use a knife to cut along the edge of the inner door of the cat screen door in and out, or first mark the edge of the inner door along the marker around the marker, remove the sand door along the marker to cut the sand window after the sand door is installed 4. Fourth step: while the two hook accessories cut out, inserted in the bottom middle of the jack, used to control the cat screen door in or out