Material: ABS plastic (durable, high quality) Size options - S: height 19.7 cm, width 19 cm, thickness 2 cm; door cover size: inner height 15 cm x inner door width 15 cm - M: height 19.7 cm, width 19 cm, thickness 5.3 cm; door cover size: inner height 15 cm x inner door width 15 cm - L: height 25 cm, width 23.5 cm, thickness 5.3 cm; door cover size: inner height 19 cm x inner door width 18.2 cm Four switch modes - Four independent models to lock with switches: swing out only, swing in only, both in and out, and fully locked - This provides easy control of your pet's in and out Easy to install - Complete instructions included - Suitable for installing on windows, doors, cupboards, and other openings Use scenarios - Regulate your pet's access: use the appropriate switch mode to let your cat or small dog go in or out as needed - Confine rooms during cleaning or visitors: keep pets in a designated area by locking the opening - Prevent access to certain areas: install on cupboards or pantry doors to stop pets from opening them This description preserves the original product specs and functions while presenting clear, customer-friendly details.