The price is for the durable Aluminum caster wheels on bases. The wheels were manufactured with a tiny hole inside, as the wheels are Hollow. The bases are strong and they have some common Oxidation and Wear. Each base measures over 6″ long and approximately 1″ wide. The wheels each measure approximately 1″ diameter. The height from the top of the base to the bottom of the wheel, [not counting the mounting pin], is approximately 1 5/8″. Each wheel has an approximately 1″ diameter. There is a rod that extends down, from each base. These 2 durable Aluminum bases, each with 2 wheels, would display well.