This 43.3-inch cat exercise wheel is built from sturdy MDF board and sized for cats weighing 17 to 25 lbs, with a 39.37-inch inner diameter and 11-inch-wide track that give plenty of room to run. The 0.5-inch-thick panel construction and widened 13.31-inch base add stability during active play, while a narrow 0.2-inch gap along the track helps keep paws safe. A built-in silent wheel and noise-reducing holes in the base cut down on running noise for a quieter home. Rated to support 150 to 190 lbs, the wheel weighs 40.9 lbs for a solid, freestanding build finished in a bright yellow tone. It ships with pre-installed hardware, gloves, a screwdriver, and a cat teaser wand to help your cat get started. The detachable looped carpet mat lining the track lifts off for easy cleaning, and a locking mechanism holds the wheel steady so it can double as a resting spot when playtime is over.