About these itemsBuilt to Last and Secure: Each cat wheel is crafted from thick 0.5" solid wood board with a 0.2" ultra-narrow track gap to protect paws during use. The widened base and precision structure offer stability even during fast runs. These cat wheels support various health benefits like weight management, energy release, and improved joint flexibility-helping your cat live a longer, happier life.Quiet and Peaceful Use: Designed for indoor tranquility, each cat treadmill is built with a silent bearing system and noise-reduction base to minimize operational sound. This makes the wheel ideal for homes that value both feline fitness and household calm.Sizes for All Cats: Available in multiple sizes-from XS (29.5") to XXL (52")-these wheels accommodate cats weighing from 6 lbs to 30 lbs. Whether you have a petite kitten or a larger breed, there's a model fit for safe and unrestricted movement.Effortless Setup and Maintenance: With pre-installed expansion screws and wheel, each unit allows quick assembly. Accessories like gloves, a screwdriver, and a teaser toy are included for added ease. The looped, detachable running mat is non-scratch and easy to clean with a damp cloth or sponge.Versatile Cat Wheel Functionality: Featuring a locking mechanism to secure the wheel when stationary, this multi-purpose cat accessory doubles as a fun toy, a relaxing lounge spot, or a stylish furniture piece. Let your cat run, nap, or play-all on one durable platform.Key DifferencesSize and Capacity:XS Model (GX4.0 XS): 29.5" outer diameter, for cats 6–8 lbsM Model (GX4.0 M): 35.8" outer diameter, for cats 7–13 lbsXL Model (GX4.0 XL): 43.3" outer diameter, for cats 17–25 lbsXXL Model (GX4.0 XXL): 52" outer diameter, for cats 18–30 lbsTrack Width and Length:XS and M models have a 10.2" wide trackXL and XXL models feature a wider 11" track for larger catsWeight and Load Support:Ranges from 25.2 lbs to 49.6 lbs net weightSupports between 120 to 220 lbs depending on modelBase Dimensions and Product Height:Larger models (XL & XXL) have wider and longer bases for added stabilityProduct height ranges from 31.5" to 55.7"SpecificationsGX4.0 XSOuter Diameter: 29.5"Inner Diameter: 25.6"Track Width: 10.2"Cat Weight Range: 6–8 lbsWeight Capacity: 120–160 lbsProduct Weight: 25.2 lbsDimensions: 29.5 x 12.52 x 31.5 inGX4.0 MOuter Diameter: 35.8"Inner Diameter: 31.5"Track Width: 10.2"Cat Weight Range: 7–13 lbsWeight Capacity: 130–170 lbsProduct Weight: 31.97 lbsDimensions: 35.8 x 12.52 x 38.2 inGX4.0 XLOuter Diameter: 43.3"Inner Diameter: 39.37"Track Width: 11"Cat Weight Range: 17–25 lbsWeight Capacity: 150–190 lbsProduct Weight: 40.9 lbsDimensions: 43.3 x 13.31 x 46.1 inGX4.0 XXLOuter Diameter: 52"Inner Diameter: 46.85"Track Width: 11"Cat Weight Range: 18–30 lbsWeight Capacity: 190–220 lbsProduct Weight: 49.6 lbsDimensions: 52.1 x 13.31 x 55.7 inPackage Contents1 x Cat Exercise Wheel1 x Pair of Gloves1 x Screwdriver1 x Cat TeaserColorblock,Plain