This 2-½” x 1” Hard Rubber Single Wheel Caster with treaded are excellent for lightweight applications, such as printer stands, office carts, small furniture, chairs and more. Single wheel furniture casters come definitive with a ball race for clear swivel action, zinc plating for decay defiance, and hard rubber wheels. Hard rubber wheels are also excellent for use on store fixtures, carts and institutional equipment. They feature resistance to most chemicals and oils.These casters are made to last and resistant to rustic elements. Hard rubber wheels offer an immense amount of ease.