This is a Vevor cat exercise wheel, 48-inch diameter, fully assembled. "Spacious for Medium to Large Cats: Measuring 48 in/1200 mm outer diameter and 43 in /1080 mm inner diameter, this cat exercise wheel supports cats up to 28 lbs. With 14 in wide track, it provides ample space for medium to large cats. It helps increase exercise, burn energy, or aid in weight loss for overweight cats to maintain health."
You will need a truck or a large-ish car to get it home without disassembly. It took a while to put it together so I suggest you try to find a way to move it intact. But it can be disassembled if necessary.
It takes some diligence to teach a cat to run on the wheel for fun. Initially our cats were pretty indifferent to the wheel, but I got one of the cats to chase a feather on the wheel and after several sessions the cat was starting to get the idea that she could use the wheel on her own. But admittedly the wheel did take up a lot of space in the living room and eventually my wife and I agreed it wasn't worth the space. If our cats had no other way to get exercise we would have kept it.