Listing is for one (1) Service Caster leveling caster with a 2.83” diameter black nylon wheel and M16 metric threaded stem. Supports up to 1100lbs per caster. When searching for a reliable and durable solution to your caster needs, consider Service Caster's adjustable leveling casters. Adjustable leveling casters are ideal for light, medium and heavy duty applications and are used in a broad range of institutional and commercial applications, as well as in the home and office. These casters support heavy computer and medical equipment, industrial tables, display cases, and other furniture that require a level, stable platform while retaining the ability to roll. Simply roll into position then engage the leveling foot by hand or wrench to make completely stationary. Leveling casters have a high quality, die cast aluminum powder coated body and a non-marking nylon wheel. Mounting options include threaded stem bolts and top plates, which include additional fastening bolts to ensure a stable and secure attachment.