Package Include: 2 x wheels with brake(back); 2 x wheels without brake(front). 4sets in total.
Size Information: wheels, 2.4inches in diameter, 1.6inches wide.
Easy Installation: No need screws to fix, just install the wheels correctly to the four corners of the tank. Then you can push the terrarium to move, quiet scrolling and protect your hardwood floors from any scratching or extra pressure.
