Space Saving Door Mounted Cat Shelves Vertical door mounted design saves floor space, making it suitable for small homes or apartments. Notice: The door thickness should be 3 millimeters or less, and the overall door thickness is less than 55 millimeters. Sturdy construction and reliable support Made from a sturdy multilayer board for durability. Each plank can support up to 15 pounds. The complete unit is capable of holding up to 4 cats at the same time. Multiple level platforms for entertainment and activity 2, 3, and 4 level platform configurations provide varied heights for exploration. Cats can jump, climb, and perch, which promotes physical activity and engagement. The shelves offer scratching surfaces and resting spots, encouraging natural behavior. Use scenarios and applications Small apartment or dorm room: mount on a door to create a compact vertical playground without consuming floor space. Multicat households: use the different levels to reduce territorial conflicts by giving each cat its own perch. Temporary or rental spaces: easy to install on standard doors, offering a way to enrich a living area without remodeling. Key attributes and performance Function: door mounted cat shelves for space efficiency and vertical enrichment. Compatibility: designed for door mounting with specified thickness considerations (3 mm reference and under 55 mm total thickness). Size footprint: compact, doormounted solution that does not occupy floor space. Material: sturdy multilayer board. Maximum capacity: up to 15 lbs per plank; total support for up to 4 cats across the structure. Levels: 2level, 3level, and 4level platform configurations to suit the space and the cats' activity needs.